18. The trouble with owning a foreign car is that ?____? parts are so expensive.?
A. extraB. separateC. spareD. reserve?
19. Whenever he writes to his parents, he ?____? a check with his letter.?
A. includesB. containsC. insertsD. encloses?
20. The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ?____? in his body.?
A. proceedB. practiseC. progressD. precede?
21. When Mr.Green was away on business, his neighbor gave his wife a(n) ?____? with the housework.?
A. aidB. helpC. handD. lift?
22. There is a ?____? of vegetables in Dalian at the moment because of the cold weather.?
A. needB. wantC. shortageD. desire?
23. When I heard footsteps behind me I was ?____? of being attacked.?
A. horrifiedB. horribleC. terrificD. terrified?
24. His illness made him ?____? of concentration.?
A. incompetentB. unable?
C. incapableD. powerless?
25. I let children make their own decisions now they are older; I wouldn’t ?____? to interfere.
A. presumeB. resumeC. assumeD. force