题目内容
4. While Mary was listening to music,Jenny her room.
A. cleans B. cleaned
C. was cleaning D. will clean
4. C “听音乐”的动作与“打扫房间”的动作同时发生,应用过 去进行时表达。故选C.
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题目内容
4. While Mary was listening to music,Jenny her room.
A. cleans B. cleaned
C. was cleaning D. will clean