21、--It is hard to find a job today.

--I might at least get some work experience _________ I don't get a good job.

    A. so that         B. in cast           C. now that          D. even if

20、 _________ puzzles me most is that I don't know _________ the difference between the two lies.

    A. What; how     B. What; where      C. That; what        D. How; which

19、--Did you remember the days _________ we worked on the farm?

--Certainly. Especially the hard times _________ we spent together.

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

18、The boss insisted that every minute _________ made full use of _________ the work well.

    A. be; to do       B. was; doing        C. be; doing         D. was; to do

17、All her time _________ experiments, she has no time for films.

    A. devoted to do                         B. devoted to doing

    C. devoting to doing                   D. is devoted to doing

16、Can't you notice that there is little time left? please tell me the whole thing _________.

    A. in case        B. in brief           C. in total           D. in detail

15、After he retired from his office, Mr. Green _________ painting for a while, but soon lost interest.

    A. took up        B. kept up          C. make up for       D. take into account

14、The perfect accomplishment of Shenzhou - 7 spacewalk mission is a powerful _________ to our country's achievement, which has _________ our country's status in the world.

    A. evidence; enlarged                    B. witness; promoted

    C. abundance; increased                D. insurance; improved

13、_________ by the terrible earthquake, Wenchuan, a city in Sichuan province, was _________ from the outside.

    A. Having struck; cut up                B. Struck; cut down

    C. Having struck; cut out               D. Struck; cut off

12、--Where is Tom?

--Well, he _________ you _________ here. Otherwise he would come down right now.

    A. didn't know; were                   B. hasn't known; are

    C. doesn't know; are                   D. hadn't known; were