diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index d06f4ee8d..dffa3d403 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -30,7 +30,7 @@ class ExerciseController < ApplicationController
       redirect_to exercise_index_url(:course_id=> @course.id)
     else
       @can_edit_excercise = (!has_commit_exercise?(@exercise.id,User.current.id)) || User.current.admin?
-      @percent = get_percent(@exercise,User.current)
+      # @percent = get_percent(@exercise,User.current)
       exercise_questions = @exercise.exercise_questions
       @exercise_questions = paginateHelper exercise_questions,5 #分页
       respond_to do |format|
@@ -239,6 +239,13 @@ class ExerciseController < ApplicationController
   end
 
   private
+  # 获取问题的答案
+  def get_user_answer(question,user)
+    user_answer = question.poll_votes.where("#{PollVote.table_name}.user_id = #{user.id}")
+    user_answer
+  end
+
+  # 是否完成了答题
   def get_complete_question(exercise,user)
     questions = exercise.exercise_questions
     complete_question = []
@@ -251,6 +258,7 @@ class ExerciseController < ApplicationController
     complete_question
   end
 
+
   def get_percent exercise,user
     complete_count = get_complete_question(exercise,user).count
     if exercise.exercise_questions.count == 0