of admiration.

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

8. The auto company succeeded in developing a type of new energy vehicle, _______ countless failures.

A. experiencing B. to experience

　C. to have experienced D. having experienced

9. By December 017, the number of Chinese netizens reached 77 million, ____ 718 million surf the Internet via mobile phones.

A. which B. whose

　C. of which D. for whom

10. Located ______ the Belt meets the Road, Jiangsu will contribute more to the Belt and Road construction.

A. why B. when C. which D. where

11. Held inside for too long, regret _______ affect the immune system.

A. can B. must C. should D. shall

12. -Have you been to Bangkok?

--Actually, I _____ there for three years and then I left for home when my mother was ill.

A. has worked B. had been working

　C. was working D. worked

13. At ______ he thinks is the appropriate moment, he will tell them _____ he has suffered these years.

A. when; that B. when; what

　　C. what; what D. what; which

14. It was only when he was sent to hospital _____ fully aware of the value of health.

A. did he become B. that he became

　　C. had he become D. that did he become

15. -Wall Street English just launched a new WeChat learning platform and we can take free classes.

--_____! Let me have a look!