题目内容
_____ Monday morning he wrote an article on grammar. _____ Monday morning he had written an article on grammar.
- A.By
- B.On
- C.At
- D./
B
解析:
A.用on(at)+过去时间状语,句子用过去时;by+过去时间状语,句子用过去完成时.
解析:
A.用on(at)+过去时间状语,句子用过去时;by+过去时间状语,句子用过去完成时.
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