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外语
The students ______ busily when Miss Brown went to get a book she ______ in the office.
The students ______ busily when Miss Brown went to get a book she ______ in the office.
admin
2019-03-24
86
问题
The students ______ busily when Miss Brown went to get a book she ______ in the office.
选项
A、were writing; has left
B、had written; left
C、were writing; had left
D、had written; had left
答案
C
解析
考查时态。“把书忘在办公室”发生在“去取书”这一过去的动作之前,因此要用过去完成时。句中when表示某一时间点,某人在某一时间点做某事,用过去进行时。因此主句应该用过去进行时。故答案为C。
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专业英语四级
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