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    精英家教网 > 高中英语 > 题目详情
    Some aspects of a pilot’s job__________ be boring, and pilots often ________ work at inconvenient hours．
    A．can; have toB．may; canC．have to; may D．ought to; must
    A
    考查情态动词。Can表示可能，have to 必须；不得不
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