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

試題分析：考查情態(tài)動詞:第一空填can，表示“有客觀的可能性”，第二空填have to表示不得不，句意：某些方面，飛行員的工作可能很乏味，飛行員經(jīng)常在不方便的時候工作。選A。
點評：考查情態(tài)動詞，要看每個情態(tài)動詞的基本意思，還有的情態(tài)動詞不止一個意思，如：can可以表示“能夠，可以，有可能”做題時注意看符合哪個意思。
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