二、单选(满分10分)
21.In recent years ____ global warming is becoming _____ concern of people all over the world.
A. the, the B. /, / C. /, a D. the, /
22.The building_______ now is our school library, one_______ in 1980.
A. repaired; built B. being repaired; built
C. being repaired; build D. be repaired; was built
23．In order to catch up with her classmates, _____.
A. a lot of books were bought by Mary’s mother
B. Mary’s father helped her with her lessons
C. Mary worked hard at her lessons around the clock
D. Mary’s classmates helped her a lot
24. his hard work , the businessman succeeded in overcoming all the difficulties .
A. Regardless of B. Thanks to C. In favor of D. With regard to
