20. I shall never forget those years ____I lived on the farm with the farmers, ____has a great effect on my life.

　 A. when; who　　　 B. that; which　　 C. which; that　　　 D. when; which

19. With water_____, we must be prepared for the much more serious situation of fighting against the flood.

　 A. rise　　　　　　 B. rose　　　　 C. rising　　　　　 D. to rise

18. Once_______, this dictionary will be very popular.

　 A. having printed　 B. printing　　　 C. to be printed　　 D. printed

17. It was the training ____ he had as a young man____ made him such a good engineer．

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

16．Tom works very hard. His brother, ____, doesn’t do much at all.

A．what’s more 　　　 B．on the contrary 　　　 C．for one thing 　 D．even worse

15.He was considered____ in the supermarket when he was doing shopping yesterday.

A. being badly treated　　　　　 　　　　　　 B. treating badly

C. to be treated badly　　　　　　 D. to have been badly treated

14.He came back late, ______ which time all the guests had already left.

A. after　　　　　 B. at　　　　　 C. by　　　　　 D. during