【題目】Tom clean the classroom. It’s not his duty today.

A.needB.needn’tC.don't needD.needn’t to

【答案】B

【解析】

句意:湯姆不需要打掃教室,今天不是他值日。

本題考查的是need的用法,根據(jù)句子后面的not his duty可知,前面是否定詞,故排除A,又因?yàn)?/span>need既可以做情態(tài)動(dòng)詞也可以做實(shí)義動(dòng)詞,如果need做情態(tài)動(dòng)詞后面跟動(dòng)詞原形,排除D,Tom是第三人稱(chēng)單數(shù),不能用don’t,故排除C,故答案選B。

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