Iletters since then, but I haven't finished them yet.[ ]A. have written B. have been writingC. wrote D. has been writing-初中英语-魔方格

◎ 题干

I letters since then, but I haven't finished them yet.

[ ]

A. have written
B. have been writing
C. wrote
D. has been writing

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◎ 解析

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◎ 知识点

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