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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; have to?
    C．have to; mayD．ought to; must?
    A?
    句意为“做一个宇航员某些方面可能很乏味，而且他们常常不得不在很不适宜的时候工作”。第一空表示在某种情况下“可能会”，用can; 第二空表示客观情况下“必须”，用have to。
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