【題目】He to clean the classroom.

A. needn’t B. don’t need C. doesn’t need D. needn’t to

【答案】C

【解析】句意:他不必要打掃教室。need既可作實(shí)義動(dòng)詞變可作情態(tài)動(dòng)詞。情態(tài)動(dòng)詞其不定形式為:needn’t do sth.,作實(shí)義動(dòng)詞其否定形式為:do/does/did not need to do sth.A、D形式不正確,因?yàn)橹髡Z(yǔ)為第三人稱單數(shù),所以不能選B,故選C。

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