题目内容
13.We _______ turn off the lights before we leave the classroom.( )A. | must | B. | can | C. | may | D. | need |
分析 在我们离开教室之前必须关上灯.
解答 答案:A.must一定,必须;can能,会;may可以;need需要.根据We _______ turn off the lights before we leave the classroom,可知我们在离开教室之前,一定关上灯,这是必须要做的事情.must一定,必须.故选A.
点评 本题考查了情态动词的用法.解答时注意句意以及所给选项的不同意思和用法.
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