题目内容
5.Now all passengers show their ID cards and go through the safety check before they take a train.( )| A. | would | B. | may | C. | could | D. | must |
分析 现在所有乘客在乘火车前都必须出示身份证,并经过安全检查.
解答 答案:D.would将会;may可以;could可能;must一定,必须.根据Now all passengers show their ID cards and go through the safety check before they take a train.可知现在所有乘客在乘火车前都必须出示身份证,并经过安全检查.这是必须要做的事.must一定,必须.故选D.
点评 本题考查了情态动词的用法.解答时注意must的用法:一定,必须,表示必须要做的事情.
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