问题

Great changes ___ in the past ten years in China.

A:took place
B:have taken place
C:were taking place
D:had taken place;

正确答案是：

同类题型

We will use ______ and get ______ on the Internet.

It is you as well as your wife that ______ your son’s bad performance at school.

下列各句中，没有语病的一项是（）

Mike is a good boy. He often _________ to help his classmates.

Zhou Yang won the 1500-meter Olympic title at the Sochi Winter Games on February 15. —_______________________