【題目】Tom and I__________ know her family name.

A. am not B. aren’t

C. don’t D. isn’t

【答案】C

【解析】句意：Tom和我不知道她的姓是什么。am not不是，主語(yǔ)是I；aren’t不是，主語(yǔ)是復(fù)數(shù)；don’t不，后面跟實(shí)義動(dòng)詞；isn’t不是，主語(yǔ)是單數(shù)�？蘸�know是實(shí)義動(dòng)詞，否定句應(yīng)用助動(dòng)詞do構(gòu)成，故應(yīng)選C。

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