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Some aspects of a pilot's job      be boring, and pilots often      work at inconvenient hours.
A.can ; have toB.may ; can
C.have to; mayD.ought to; must
A

试题分析:考查情态动词:第一空填can,表示“有客观的可能性”,第二空填have to表示不得不,句意:某些方面,飞行员的工作可能很乏味,飞行员经常在不方便的时候工作。选A。
点评:考查情态动词,要看每个情态动词的基本意思,还有的情态动词不止一个意思,如:can可以表示“能够,可以,有可能”做题时注意看符合哪个意思。
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