18、Through the reform, the economic situation of China ______ much better than it used to be.

A. turned into           B. turned off         C. turned to         D. turned out

17、She had experienced many hardships _______their journeys, but she was amazed at the sight of the beautiful scene.

A. in view of             B. in terms of                   C. in the case of           D. in the course of

16、---I wonder why he ______ so strangely these days.

---Recent pressure at study may account for his behavior.

A. was acting                 B. acted            C. is acting          D. acts

15、It is global warming, rather than other factors, ___the extreme weather.

 A. that have led to                          B .which has caused 

C. which are causing                        D. that has led to

14、By improving reading skills, you can read faster and understand more of ________you once thought impossible to understand.

A. that              B. what                C. which              D. whether

13、---I’m going to Beijing next week. Do you have anything ______to your son?

---No，thanks.

A. taken                B. to take               C. to be taken              D. take

12、James Cook was a strict captain, but ______all the sailors on the ship showed respect for.

A. that              B. the one                 C. who             D. one

11、Research findings show we spend about two hours dreaming every night, no matter what we     _________during the day.

A. may have done          B. could do         C. must have done          D. would do

10、____ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.

A. As              B. With                 C. When               D. If

9、Not only did the Great Wall of China serve as a defense in the north but also______ the power of the emperor. 

A. symbolize             B. to symbolize            C. symbolizing              D. symbolized