283. Watching some professional videos in Google’s index _______ free software ______ at http://.

　 A. provide ; useful　　 B. requires ; available　 C. provides ; useful　 D. requires ; useful

282. ----- I’d like a table for six .

　 -----Sorry, Sir, but we　 don’t have any tables _______ right now .

　 A. unable　　 B. suitable　　 C. comfortable　 D. available

281. You’d better put away some money for old age . That is to say , to save money ______ a rainy day.

　　 A. by　 B. before　　 C. at　　 D. against

280. Because we were sailing ______ the wind ,we had great difficulty in getting to the opposite bank.

　　 A. with　 B. against　　 C. by　 D. at

279. We are told that “not” and “cold” are ______ terms.

　　 A. contrary　　 B. similar　　 C. same　　 D. different

278. -----He’s no use at all.　　 ----- ______, I have found him a great deal of use.

　　 A. Cenerally speaking　 B. Believe it or not　 C. First of all　 D. on the contrary

277. It’s very _______ that every time I try to ride a bicycle , I fell off.

　　 A. discouraged　　 B. discouraging　　 C. discouragement　　 D. being discouraged

276. It was late . He wondered whether it would be ________ to knock at the door of her room.

　　 A. proper　　 B. better　　 C. interesting　　 D. disappointed

275. I don’t think Peter is too young to take care of the pet dog ______ .

　　 A. correctly　　 B. properly　　 C. exactly　　 D. actively

274. I’m sorry . We’re ______ that kind of trousers . Would you come back next week ?

　　 A. short　　 B. lacking　 C. in need　　 D. short of