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【題目】—How many letters you to your mother?

— 109 in all, since 2016.

A. has, writtenB. have, writtenC. did, writeD. are, writing

【答案】B

【解析】

句意“-你已經寫給你媽媽多少封信了?-2016年開始,總共109封”。A.現(xiàn)在完成時;B.現(xiàn)在完成時;C.一般過去時;D.現(xiàn)在進行時。根據(jù)since 2016可知,用現(xiàn)在完成時,排除CD;且根據(jù)主語you可知,用have done形式,故選B。

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