【題目】It’s snowing all day, so mybrother ______ stay at home.

A. must B. have to C must to C. has to

【答案】D

【解析】考查must與have to的區(qū)別。must表示主觀上的必須，而have to表示客觀上的“不得不”。根據(jù)語境中的It’s snowing all day可知這是客觀情況下的“不得不”，主語為my brother，謂語動(dòng)詞用三單形式。

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