题目内容

16．______ it have been the failure to pick up directions from the ground control that caused the air crash？（　　）
A．MustB．CouldC．WouldD．Should

分析 可能是来自控制室的错误指示导致这起飞机坠毁事件的吗？

解答 答案B．
A项"必须，一定"；C项"将，将要；愿意"；D项"应当，应该"；B项"能够，可能"；分析句子结构可知，该句是强调句型"It is/was…that…"结构，去掉主干部分后结构为"the failure to pick up directions from the ground control  caused the air crash"，来自控制室的错误指示可能是飞机坠毁的原因之一，故选B．

点评 本题考查情态动词．解答此类题目关键是要读懂句意，并且对每个情态动词的基本用法和特殊用法都要熟知，然后根据语境辨析锁定答案．

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