题目内容：

单项选择：Great changes ____ in the past ten years in China .
A:took  placeB:have  taken  place C:were  taking  placeD:had  taken  place

优质解答

Great changes ____ in the past ten years in China .A:took place　B:have taken place 　C:were taking place　D:had taken place选B.句子中有“在过去的多少时间里”时,一般用现在完成时.如：in the past ten ye...