A latest report by Taobao said that visitors through wireless devices from 10 million in 2010 to 300 million by the end of last year．A．would growB．has grownC．has been growingD．had grown 题目和参考答案——青夏教育精英家教网——

题目内容

3．A latest report by Taobao said that visitors through wireless devices _______ from 10 million in 2010 to 300 million by the end of last year．

	A．	would grow		B．	has grown
	C．	has been growing		D．	had grown

分析淘宝公布的一份最新的报告称通过无线设备访问的来访者截止到去年年底已由2010年的1000万增长到了3亿．

解答答案：D
根据本句的时间状语 by the end of last year：到去年年底为止，即指在去年年底之前，因此这里表示的是在过去某时间之前发生的动作或状态，所以要使用过去完成时即：had+动词的过去分词形式．故选D

点评本题考查了过去完成时的用法．首先应知道过去完成时表示过去某一时间或动作以前已经发生或完成了的动作，即表示发生在过去的过去的动作或状态，它的立足点是过去，；句中的时间状语通常有：by+过去的时间点； by the end of+过去的时间点；before+过去的时间点等．

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