diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index 4d2e266b5..8ca8ca31f 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -125,7 +125,7 @@ class ExerciseController < ApplicationController
       for i in 1..params[:question_answer].count
         answer = (params[:question_answer].values[i-1].nil? || params[:question_answer].values[i-1].empty?) ? l(:label_new_answer) : params[:question_answer].values[i-1]
         question_option = {
-            :answer_position => i,
+            :exercise_choice_id => i,
             :answer_text => answer
         }
         @exercise_questions.exercise_answers.new question_option
@@ -139,6 +139,10 @@ class ExerciseController < ApplicationController
       @exercise_questions.question_number = params[:quest_num].to_i + 1
     end
     if @exercise_questions.save
+      standart_answer = ExerciseStandardAnswer.new
+      standart_answer.exercise_question_id =  @exercise_questions.id
+      standart_answer.exercise_choice_id = params[:exercise_choice]
+      standart_answer.save
       respond_to do |format|
         format.js
       end
diff --git a/app/views/exercise/_new_MC.html.erb b/app/views/exercise/_new_MC.html.erb
index de7e9ba31..1b82d35ce 100644
--- a/app/views/exercise/_new_MC.html.erb
+++ b/app/views/exercise/_new_MC.html.erb
@@ -43,7 +43,7 @@
       <div class="cl"></div>
       <li class="ur_item">
         <label>标准答案<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-        <input placeholder="若标准答案为A，在此输入A即可" type="text">
+        <input name="exercise_choice" placeholder="若标准答案为A，在此输入A即可" type="text">
       </li>
       <div class="cl"></div>
     </ul>