-It has been thirty years since I my hometown．-How time flies!Great changes in our hometown in the last thirty years．( )A．leave, take placeB．left, have been taken placeC．left, have taken placeD．题目和参考答案——青夏教育精英家教网—

题目内容

18．-It has been thirty years since I my hometown．
-How time flies!Great changes in our hometown in the last thirty years．（　　）

	A．	leave； take place		B．	left； have been taken place
	C．	left； have taken place		D．	have left； took place

分析 --自从我离开家乡已经有三十年了．
--时间过得多么快啊！在过去的三十年家乡发生了多么大的变化啊．

解答答案：C．根据以since引导的时间状语从句，主句应用现在完成时，从句用一般过去时可知，本空应用一般过去时，故用left，排除AD；又根据家乡的变化是从三十年前开始变化，一直持续的现在，应用现在完成时；现在完成的结构是have/has+过去分词；又根据take place"发生"不能用于被动语态，故排除B．故选C．

点评本题考查一般过去时和现在完成时时，做题时应注意题干中暗示的动作发生的时间．