问题
选择题
When he ____home,he saw his mother cleaning the room.[ ]
A. gets back
B. got back
C. had got back
D. has got back
答案
答案：B
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When he ____home,he saw his mother cleaning the room.[ ]
A. gets back
B. got back
C. had got back
D. has got back
答案：B
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