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________ I came into the office, the teachers were having a meeting.

时间:2022-04-28 22:05:02

________ I came into the office, the teachers were having a meeting.

A.While

B.When

C.Once

D.Since

答案及解析: B

解析:

while引导的从句中动词常常是表示延续的动词或表示状态的连系词be; when表示“当……的时候”;

once表示条件;

since表示时间时意思是“自从……”。根据句意可知选B项。

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