Question

Great changes ______ in the past few years, and a lot of factories ________.

A．had taken place; have been set up	B．have taken place; have been set up
C．took place; have set up	D．were taken place; were set up

Answer 1

B

试题分析：句意：在过去的几年里发生了很大变化，许多工厂都建立起来了。根据in the past few years可知与现在完成时连用，又因为take place没有被动语态，factories与set up之间是被动关系，故选B。
点评：本题难度适中。
即学即练：Experiments of this kind ______in both the U.S. and Europe well before the Second World War.
A. have conducted      B. have been conducted
C. had conducted       D. had been conducted
解析：D。句意：“就在二战爆发前，美国和欧洲都进行过这种实验。”首先考虑语态，主语experiment与conduct构成动宾关系，谓语使用被动形式。题干中出现the second war是过去的时间点，before the second war是过去的过去，因此使用过去完成时。选D。