He had to return to his home in Beijing because his flight ．( )A．had cancelledB．has been cancelledC．will be cancelledD．had been cancelled 题目和参考答案——青夏教育精英家教网—

7．He had to return to his home in Beijing because his flight ．（　　）

	A．	had cancelled		B．	has been cancelled
	C．	will be cancelled		D．	had been cancelled

分析他不得不回到北京的家，因为他的航班被取消．

解答答案是D．本题考查过去完成时的被动语态；过去完成时强调"过去的过去"，强调动作发生在过去某一时间或动作之前；本题中had to return是过去，cancel发生在had to return之前，所以是"过去的过去"，并且航班是"被取消"，故需要过去完成时的被动语态，答案选D．

点评对时态的选择，要在把握时态的基本用法的基础上，根据具体语境和题干中的时间推断时态，同时关注特殊的结构．

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