【題目】Food safety is important.Rules________ to protect people from food pollution.

A. must make B. must be made

C. can't D. can't be made

【答案】B

【解析】

句意:食品安全是重要的。必須制定規(guī)則來保護人們不受食品污染的危害。must make必須制定;must be made必須被制定,被動語態(tài);can’t不能;can’t be made不能被制定。根據(jù)句意可知,主語Rules 和動詞make構(gòu)成被動關(guān)系,應(yīng)用被動語態(tài),此句為情態(tài)動詞的被動語態(tài),故選B。

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