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1．Why____you____us？（　　）

A．

don't，joining

B．

don't，join

C．

not，join

D．

don't，join in

分析你為什么不加入我們？

解答答案：B．考查疑問詞．句意"你為什么不加入我們？"join 表示參加某一團體并作為其中一員，如果后接人，則表示參加某人的活動；join in sth/doing sth．意為"參加"，后面接的賓語一般是表示競賽、娛樂、游戲等活動的名詞或V-ing，而不能直接接人．why don't+主語+動詞；why not一定要直接跟動詞，動詞前不能有其他成分．根據題干Why____you____us？可知結合選項前面用don't表示否定，后面的動詞用原形join．即你為什么不加入我們？故選B．

點評仔細分析句子的結構，根據具體內容作答．

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