题目内容
---When did Kate’s grandma die?
---While the doctors______ on her.
A.are operating |
B.were operating |
C.operate |
D.operated |
【答案】
B
【解析】略
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题目内容
---When did Kate’s grandma die?
---While the doctors______ on her.
A.are operating |
B.were operating |
C.operate |
D.operated |
B
【解析】略