20. These new discoveries may _______ light on the origin of the universe.

A. put　 　　　　　　　　　　　　　 B. gave　　　　 C. threw　　　　　 D. brought

19. To my surprise, the well-dressed gentleman _______ out to be a thief.

A. came　 　　　　　　　　　　　 B. let　　　　　 C. went　　　　　 D. turned

18. - How is everything going?

- It couldn’t be _______, for I lost my wallet this morning.

A. worse　 　　 　　　　B. bad　 　　　　 　　C. good　　　　　　 　　　 D. better

17. It is only when you nearly lose someone _______ fully conscious of how much you value him.

A. do you become　　　　　　　　　　　　　　　　　　 　 B. then you become　

C. that you become 　 D. have you become

16. Word came ______ some guests will come for a visit to our company next month.

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