2. 1-5 CACAC 6-10 CDDBB 11-15 BBBDD 16-20 DCDAC
20. A. that B. which C. as D. so
19. A. may B. must C. need D. should
18. A. become s B. goes C. gets D. grows
17. A. pay B. charge C. return D. offer
16. A. question B. mistake C. doubt D. problem
15. A. sentence B. speech C. text D. motto
14. A. and less B. or less C. and more D. or more
13. A. this B. that C. it D. the one
12. A. Cheap B. Expensive C. Heavy D. high-tech