diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index 8b0ad2ad5..7cd854d61 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -113,21 +113,6 @@ module ExercisesHelper
       if ex.question_type <= Exercise::JUDGMENT  #选择题和判断题
         standard_answer = ex.exercise_standard_answers.pluck(:exercise_choice_id).sort   #标准答案的位置
         right_users_count = 0  #该问题的回答正确的人数
-        # if ex.question_type == Exercise::MULTIPLE  #多选题
-        #   user_ids.each do |user_id|
-        #     answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).where(user_id:user_id)&.map {|s| s.exercise_choice.choice_position}.uniq
-        #     if answer_choice_array.sort == standard_answer
-        #       right_users_count += 1
-        #     end
-        #   end
-        # else  #单选题和判断题
-        #   user_ids.each do |user_id|
-        #     answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).find_by(user_id:user_id)&.exercise_choice.choice_position
-        #     if [answer_choice_array] == standard_answer
-        #       right_users_count += 1
-        #     end
-        #   end
-        # end
         user_ids.each do |user_id|
           if ex.question_type == Exercise::MULTIPLE
             answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).where(user_id:user_id)&.map {|s| s.exercise_choice.choice_position}.uniq
@@ -135,7 +120,7 @@ module ExercisesHelper
               right_users_count += 1
             end
           else
-            answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).find_by(user_id:user_id)&.exercise_choice.choice_position
+            answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).find_by(user_id:user_id)&.exercise_choice&.choice_position
             if [answer_choice_array] == standard_answer
               right_users_count += 1
             end