( )16. It is important to keep up with the news at home and abroad, because global political and economic conditions are ________ factors in the world of international business.
A. arbitrary B. concrete C. dynamic D. fragile
( )17. One senior research fellow from CCG, said he is optimistic for the future of China-US ties and that small ________ are normal, but they won’t influence the bigger picture.
A. ambitions B. frictions C. competitions D. conversations
( )18. —Daniel didn’t say anything good at all about my composition. I felt pretty “criticized”．
—Your work is to be judged and analyzed by others in class. Don’t take it ________．
A. easily B. thoroughly C. originally D. personally
( )19. A new kind of powerhouse has been built in a park in Beijing, which generates electricity by harvesting energy from raindrops, ________ for solar energy on rainy days.
A. applying B. hunting C. pushing D. substituting
( )20. New discoveries have been made by radio telescopes to solve key physics problems, ________ the largest is FAST.
A. with which B. for which C. of which D. by which
( )21. Contrary to ________ the school recently requires, the development of the program does not address the problem with