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303. She turned up the radio to _____ out the noise of the traffic .

　　 A. cover　 B. drown　　 C. flood　　 D. innudate

302. Take an umbrella ______ it rains .

　　 A. in any case　 B. in case　 C. because　　 D. for

301. You can’t waste your youth on the ______ .

　　 AAAAA> contrary　　 B. other hand　　 C. loose　　 D. moment

300. Barking dogs do not _______ .

　　 A. bite　　 B. eat　　 C. sleep　　 D. drink

299. We are lucky to be among the generation of people who have _______ and experienced the great social changes in our country .

　 A. reported　　 B. appreciated　　 C. impressed　　 D. witnessed

298. The college student ,majoring in ______ engineering , is changing an ______ lamp in his home .

　 A.　 electricity ; electronic　　　 B. electric ; electricity　

　 C. electrical ; electric　　　　　 C. electronic ; electrical

297. Every time Stephen _______ ,he pulled over more of the bedclothes to his side .

　 A. rolled back　　 B. rolled in　　 C. rolled over　　 D. rolled up

296. I don’t understand what you’re talking about . Would you ______ a little ?

　 A. explain you　　 B. express you　　 C. explain yourself　　 D. express yourself

295. All of _______ sudden , I caught ______ sight of my English teacher in the crowd , smiling to me . I calmed down .

　　 A. a ; 不填　 B. a ; a　 C. 不填 ; a　　 D. 不填 ； 不填

294. The Smiths were not rich , but they ______ to send their two daughters to collages .

　　 A. tried　　 B. managed　　 C. attempted　　 D. failed