题目内容
19．Tom___ China for 3years．（ ）| A． | has been | B． | has been in | C． | has been to |
分析 Tom在中国三年了．
解答 答案：B．
根据for 3years可知，这是一个表示一段时间的时间状语，通常用于现在完成时，而且动词应该用延续性动词，现在完成时态，结构为have/has+动词的过去分词，选项A 缺少介词，选项C，has been to 表示曾经去过，不合句意．故选B．
点评 本题主要考查现在完成时，用法：表示过去发生或完成的动作对现在造成的影响或结果，还表示过去发生动作一直持续到现在．其结构是have/has+及物动词的过去分词．
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| 43．A．which | B．whom | C．what |
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