题目内容
4．I was told to meet Mr．Green at the airport．But I don't know he will arrive．（ ）| A． | where | B． | why | C． | how | D． | when |
分析 我被通知去机场接格林先生，但是我不知道他什么时候到达．
解答 答案：D；where，哪儿；why，为什么；how，怎样；when，什么时候；根据句中的meet Mr．Green at the airport和he will arrive可以推知该空when，即"我不知道他什么时候到达"；故选D．
点评 认真比较四个选项中单词的不同含义及其用法，然后结合语境选择正确答案．
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