题目内容

5．The number of microbloggers（微博）________from 63.11million by the end of 2010to 300million in 2012．（　　）
A．have grownB．has grownC．are growingD．is growing

分析 微博用户的数量已经从2010年末的6311万增长到了2012年的3亿．

解答 答案：B
解析：根据句意"微博用户的数量已经从2010年末的6311万增长到了2012年的3亿"可知本题该使用现在完成时（表示过去发生的动作持续到现在所造成的影响或结果），故C、D选项直接排除；"the number of+可数名词复数"作主语时其谓语动词用单数形式，故A选项排除．综上，本题答案为B选项．

点评 本题考查时态与语法，做此类题目时一定要根据句意确定句子所需时态，再从语法上分析对其他方面的要求，从而确定最终的答案．

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