14. A. because B. so C. if D. whether
13. A. pulled B. cleaned C. taken D. brushed
12. A. not only B. still C. even D. only
11. A. tail B. head C. eyes D. body
10. A. most B. best C. once D. worst
9. A. soon B. far C. up D. down
8. A. friend B. enemy C. student D. family
7. A. should B. can C. need D. must
6. A. is used B. for help C. very useful D. be helpful
5. A. its B. hot C. their D. cold