题目内容
( ) 7. The students_the floor_the teacher came into the classroom.
A. were sweeping; when B. swept; when
C. were sweeping; while D. had swept; while
A
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挑战100单元检测试卷系列答案题目内容
( ) 7. The students_the floor_the teacher came into the classroom.
A. were sweeping; when B. swept; when
C. were sweeping; while D. had swept; while
A
挑战100单元检测试卷系列答案