diff --git a/Frontend/src/components/contest/contestchoiceproblem.vue b/Frontend/src/components/contest/contestchoiceproblem.vue
index b79aa85..98bc1b1 100644
--- a/Frontend/src/components/contest/contestchoiceproblem.vue
+++ b/Frontend/src/components/contest/contestchoiceproblem.vue
@@ -1,38 +1,55 @@
 <template>
   <div class="examination">
     <el-row>
-      <ul v-for="(item,i) in ChoiceProblemDatas" :key="i">
+      <ul v-for="(item,i) in ChoiceProblemDatas"
+          :key="i">
         <div>{{i+1}}、{{item.des}}</div>
-        <br />
+        <br>
         <el-col>
           <el-row>
-            <el-radio v-model="radio[i]" :label="item.choiceA" @change="getIputValue(i)"></el-radio>
+            <el-radio v-model="radio[i]"
+                      :label="item.choiceA"
+                      @change="getIputValue(i)"></el-radio>
           </el-row>
           <el-row>
-            <el-radio v-model="radio[i]" :label="item.choiceB" @change="getIputValue(i)"></el-radio>
+            <el-radio v-model="radio[i]"
+                      :label="item.choiceB"
+                      @change="getIputValue(i)"></el-radio>
           </el-row>
           <el-row>
-            <el-radio v-model="radio[i]" :label="item.choiceC" @change="getIputValue(i)"></el-radio>
+            <el-radio v-model="radio[i]"
+                      :label="item.choiceC"
+                      @change="getIputValue(i)"></el-radio>
           </el-row>
           <el-row>
-            <el-radio v-model="radio[i]" :label="item.choiceD" @change="getIputValue(i)"></el-radio>
+            <el-radio v-model="radio[i]"
+                      :label="item.choiceD"
+                      @change="getIputValue(i)"></el-radio>
           </el-row>
         </el-col>
       </ul>
     </el-row>
     <el-row>
-      <el-button type="primary" @click="Submit" v-show="havechopro == true">提交</el-button>
+      <el-button type="primary"
+                 @click="Submit"
+                 v-show="havechopro == true">提交</el-button>
     </el-row>
 
     <div v-show="havechopro == true">已提交的答案</div>
-    <el-input placeholder="已提交的答案" v-model="myanswer" :disabled="true" v-show="havechopro == true"></el-input>
+    <el-input placeholder="已提交的答案"
+              v-model="myanswer"
+              :disabled="true"
+              v-show="havechopro == true">
+    </el-input>
+
   </div>
 </template>
 
 <script>
 export default {
+
   name: "contestchoiceproblem",
-  data() {
+  data () {
     return {
       form: {
         username: "",
@@ -40,7 +57,7 @@ export default {
         number: "",
         contestid: "",
         answer: "",
-        score: "0"
+        score: "0",
       },
       myanswer: "",
       havechopro: false,
@@ -48,193 +65,184 @@ export default {
       allRadio: [],
       radio: [],
       ChoiceProblemIds: [],
-      ChoiceProblemDatas: []
-    };
+      ChoiceProblemDatas: [],
+    }
   },
   methods: {
-    compare: function(pro) {
-      return function(obj1, obj2) {
+    compare: function (pro) {
+      return function (obj1, obj2) {
         var val1 = obj1[pro];
         var val2 = obj2[pro];
-        if (val1 < val2) {
-          //正序
+        if (val1 < val2) { //正序
           return 1;
         } else if (val1 > val2) {
           return -1;
         } else {
           return 0;
         }
-      };
+      }
     },
-    Submit() {
+    Submit () {
       console.log(this.radio);
+
       if (this.$store.state.contestisend == true) {
         this.$message.error("比赛已结束");
-      } else {
+      }
+      else {
         this.form.answer = "";
         for (var i = 0; i < this.ProblenCount; i++) {
           if (this.allRadio[i]) {
             this.form.answer += this.allRadio[i];
-          } else {
+          }
+          else {
             this.form.answer += "X";
           }
         }
-        this.$axios
-          .get("/user/?username=" + this.form.username)
+        this.$axios.get("/user/?username=" + this.form.username)
           .then(response2 => {
             this.form.realname = response2.data[0].realname;
             this.form.number = response2.data[0].number;
-            this.$axios
-              .get(
-                "/conteststudentchoiceanswer/?username=" +
-                  this.form.username +
-                  "&contestid=" +
-                  this.form.contestid
-              )
-              .then(response => {
-                if (response.data.length > 0) {
-                  var updateId = response.data[0].id;
-                  this.$axios
-                    .put(
-                      "/conteststudentchoiceanswer/" + updateId + "/",
-                      this.form
-                    )
-                    .then(response3 => {
-                      this.$message({
-                        message: "提交成功！",
-                        type: "success"
+            this.$axios.get(
+              "/conteststudentchoiceanswer/?username=" +
+              this.form.username +
+              "&contestid=" +
+              this.form.contestid
+            )
+              .then(
+                response => {
+                  if (response.data.length > 0) {
+                    var updateId = response.data[0].id;
+                    this.$axios.put("/conteststudentchoiceanswer/" + updateId + "/", this.form)
+                      .then(
+                        response3 => {
+                          this.$message({
+                            message: "提交成功！",
+                            type: "success"
+                          });
+                        }
+                      ).catch(error => {
+                        this.$message.error(
+                          "提交失败！请再提交一次" + "(" + JSON.stringify(error.response.data) + ")"
+                        );
                       });
-                    })
-                    .catch(error => {
-                      this.$message.error(
-                        "提交失败！请再提交一次" +
-                          "(" +
-                          JSON.stringify(error.response.data) +
-                          ")"
-                      );
-                    });
-                } else {
-                  this.$axios
-                    .post("/conteststudentchoiceanswer/", this.form)
-                    .then(response3 => {
-                      this.$message({
-                        message: "提交成功！",
-                        type: "success"
+                  }
+                  else {
+                    this.$axios.post("/conteststudentchoiceanswer/", this.form)
+                      .then(
+                        response3 => {
+                          this.$message({
+                            message: "提交成功！",
+                            type: "success"
+                          });
+                        }
+                      ).catch(error => {
+                        this.$message.error(
+                          "提交失败！请再提交一次" + "(" + JSON.stringify(error.response.data) + ")"
+                        );
                       });
-                    })
-                    .catch(error => {
-                      this.$message.error(
-                        "提交失败！请再提交一次" +
-                          "(" +
-                          JSON.stringify(error.response.data) +
-                          ")"
-                      );
-                    });
-                }
-                this.$axios
-                  .get(
+                  }
+                  this.$axios.get(
                     "/conteststudentchoiceanswer/?username=" +
-                      this.form.username +
-                      "&contestid=" +
-                      this.form.contestid
+                    this.form.username +
+                    "&contestid=" +
+                    this.form.contestid
                   )
-                  .then(response => {
-                    this.myanswer = response.data[0].answer;
-                  });
-              });
-          });
-      }
+                    .then(
+                      response => {
+                        this.myanswer = response.data[0].answer;
+                      })
+                })
+          }
+          )
+      };
+
     },
-    getIputValue(index) {
+    getIputValue (index) {
       var ChooseAnswer = this.radio[index].split(".");
       this.allRadio[index] = ChooseAnswer[0]; // 将数据存入提交给后台的数据中
     },
-    GetItem: function(des, choiceA, choiceB, choiceC, choiceD, rank) {
+    GetItem: function (des, choiceA, choiceB, choiceC, choiceD, rank) {
       return {
-        des: des,
-        choiceA: "A. " + choiceA,
-        choiceB: "B. " + choiceB,
-        choiceC: "C. " + choiceC,
-        choiceD: "D. " + choiceD,
-        rank: rank
-      };
-    },
-    GetItem2: function(ChoiceProblemDatas) {
-      return ChoiceProblemDatas;
+        "des": des,
+        "choiceA": "A. " + choiceA,
+        "choiceB": "B. " + choiceB,
+        "choiceC": "C. " + choiceC,
+        "choiceD": "D. " + choiceD,
+        "rank": rank,
+      }
     },
-    reflash(id) {
-      this.form.username = sessionStorage.username;
-      this.form.contestid = this.$route.params.contestID;
-      this.$axios
-        .get("/contestchoiceproblem/?ContestId=" + this.$route.params.contestID)
-        .then(async response => {
-          this.ProblenCount = response.data.length;
-          if (response.data.length > 0) this.havechopro = true;
-          for (var i = 0; i < response.data.length; i++) {
-            this.ChoiceProblemIds.push(response.data[i].ChoiceProblemId);
-          }
-          this.ChoiceProblemIds.sort(this.compare("rank"));
-          this.ChoiceProblemDatas = [];
-          for (var i = 0; i < response.data.length; i++) {
-            var response2 = await this.$axios.get(
-              "/choiceproblem/?ChoiceProblemId=" +
-                response.data[i].ChoiceProblemId
-            );
-
-            this.ChoiceProblemDatas.push(
-              this.GetItem(
-                response2.data[0].des,
-                response2.data[0].choiceA,
-                response2.data[0].choiceB,
-                response2.data[0].choiceC,
-                response2.data[0].choiceD,
-                response2.data[0].rank
-              )
-            );
+  },
+  created () {
+    this.form.username = sessionStorage.username;
+    this.form.contestid = this.$route.params.contestID;
+    this.$axios.get("/contestchoiceproblem/?ContestId=" + this.$route.params.contestID)
+      .then(response => {
+        this.ProblenCount = response.data.length;
+        if (response.data.length > 0) this.havechopro = true;
+        for (var i = 0; i < response.data.length; i++) {
+          this.ChoiceProblemIds.push(response.data[i].ChoiceProblemId);
+        }
+        this.ChoiceProblemIds.sort(this.compare("rank"));
+        this.ChoiceProblemDatas = [];
+        (async () => {
+          const dataArray = await Promise.all(
+            this.ChoiceProblemIds.map(i => this.$axios.get(`/choiceproblem/?ChoiceProblemId=${i}`))
+          );
+          for (const { data } of dataArray) {
+            {
+              this.ChoiceProblemDatas.push(
+                this.GetItem(
+                  data[0].des,
+                  data[0].choiceA,
+                  data[0].choiceB,
+                  data[0].choiceC,
+                  data[0].choiceD,
+                  data[0].rank,
+                ));
+            }
           }
-
-          this.$axios
-            .get(
-              "/conteststudentchoiceanswer/?username=" +
-                this.form.username +
-                "&contestid=" +
-                this.form.contestid
-            )
-            .then(response => {
-              this.myanswer = response.data[0].answer;
-
-              var proCount = this.ProblenCount;
-              if (proCount > 0) {
-                var lastanswer = response.data[0].answer;
+        })();
+      })
+      .then(() => {
+        this.$axios.get(
+          "/conteststudentchoiceanswer/?username=" +
+          this.form.username +
+          "&contestid=" +
+          this.form.contestid
+        )
+          .then(
+            response3 => {
+              this.myanswer = response3.data[0].answer;
+              if (response3.data[0].answer) {
+                var lastanswer = response3.data[0].answer;
               }
-              for (var i = 0; i < proCount; i++) {
-                if (lastanswer[i] == "A") {
-                  this.allRadio[i] = "A";
-                  var tmp = this.ChoiceProblemDatas[i];
-                  this.radio[i] = this.GetItem2(tmp.choiceA);
-                } else if (lastanswer[i] == "B") {
-                  this.allRadio[i] = "B";
-                  var tmp = this.ChoiceProblemDatas[i];
-                  this.radio[i] = this.GetItem2(tmp.choiceB);
-                } else if (lastanswer[i] == "C") {
-                  this.allRadio[i] = "C";
-                  var tmp = this.ChoiceProblemDatas[i];
-                  this.radio[i] = this.GetItem2(tmp.choiceC);
-                } else if (lastanswer[i] == "D") {
-                  this.allRadio[i] = "D";
-                  var tmp = this.ChoiceProblemDatas[i];
-                  this.radio[i] = this.GetItem2(tmp.choiceD);
+              if (lastanswer) {
+                for (var i = 0; i < this.ProblenCount; i++) {
+                  if (lastanswer[i] == 'A') {
+                    this.allRadio[i] = "A";
+                    this.radio[i] = this.ChoiceProblemDatas[i].choiceA;
+                  }
+                  else if (lastanswer[i] == 'B') {
+                    this.allRadio[i] = "B";
+                    this.radio[i] = this.ChoiceProblemDatas[i].choiceB;
+                  }
+                  else if (lastanswer[i] == 'C') {
+                    this.allRadio[i] = "C";
+                    this.radio[i] = this.ChoiceProblemDatas[i].choiceC;
+                  }
+                  else if (lastanswer[i] == 'D') {
+                    this.allRadio[i] = "D";
+                    this.radio[i] = this.ChoiceProblemDatas[i].choiceD;
+                  }
                 }
               }
+
             });
-        });
-    }
-  },
+      })
+
 
-  created() {
-    // this.reflash()
   }
-};
+}
 </script>
 
 <style scoped>