diff --git a/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java b/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
index da83898..cfb7872 100644
--- a/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
+++ b/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
@@ -138,9 +138,10 @@ public class ExamModel {
                 JSONObject jo = new JSONObject();
                 jo.put("key", String.valueOf(x));
                 jo.put("value", record.getStr(String.valueOf(x)));
-                if (answer.indexOf(x) >= 0)
-                    jo.put("checked", true);
-                else jo.put("checked", false);
+                boolean flag = true;
+                if (StrKit.isBlank(answer)) flag = false;
+                if (answer.indexOf(x) < 0) flag = false;
+                jo.put("checked", flag);
                 array.add(jo);
             }
         }