题目内容
10.Before taking a plane at the airport,all passengers go through safety check.( )| A. | can | B. | must | C. | may | D. | ought |
分析 在机场上飞机之前,所有的乘客都必须经过安检.
解答 答案:B.can能,会;must一定,必须;may可以;ought应该.根据Before taking a plane at the airport,all passengers go through safety check,可知在机场上飞机之前,所有的乘客都必须经过安检,这是明令规定的.must一定,必须.故选B.
点评 考查情态动词的用法时,要注意must的用法.
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