Over the past decades, forest area ______ in China as a result of massive defore

题型：不详难度：来源：

Over the past decades, forest area ______ in China as a result of massive deforestation.

A．had decreased

B．decreased

C．is decreasing

D．has been decreasing

答案

解析

考查时态。Over the past+时间段，用现在完成时态，故选D。

举一反三

Will you help me to look for an important paper I left in my office this morning as soon as you _______？

A．arrived

B．arrive

C．will arrive

D．would arrive

题型：不详难度：| 查看答案

My brother John wants to work in the factory which _______ still _______.

题型：不详难度：| 查看答案

Up to now, they _________ a good way to solve that problem.

A．didn’t find

B．can’t find

C．hadn’t found

D．haven’t found

题型：不详难度：| 查看答案

These students will graduate from college next summer, by which time they
in college for four years.

A．have studied	B．had studied
C．will have studied	D．will be studying

题型：不详难度：| 查看答案

I feel sorry for myself .If I more efforts to my studies , I wouldn’t be doing a job with such low wages.
A devoted B had devoted C should devote D were to devote

题型：不详难度：| 查看答案