◎ 题干
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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“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; m…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。