268. He has recently _____ chess to provide himself with some relaxation.

　A. taken on B. taken up C. held on D. held up

267. It has been decided that this company has the _____ right to print Mr. Smith's novels.

　A.eventual B.versatile C.extensive D.exclusive

266. Jim's close _____ to his brother made people mistake them for one another.

　A. confusion B. similarity C. resemblance D. imitation

265. I think we should let Maria go camping with her boyfriend. _____, she's a big girl now.

　A.Above all B. After all C. First of all D. For all

264. During World War II Malta managed to _____ most of Italian and German bombers by throwing up an effective anti-aircraft screen.

　A. put out B. shut out C. come across D. get across

263. The room was so quiet that she could hear the _____ of her heart.

　A. hitting B. beating C. tapping D. knocking

262. The new safety regulations were agreed on after _____ with the work-force.

　A. conference B. participation C. intervention D. consultation

261. His test results are not very _____. He does well one week and badly the next.

　A. invariable B. consequent C. continuous D. consistent

260. Scientists think they have _____ in their attempt to find the causes of some major dieases.

　A. broken through B. worked out C. fallen out D. got round

259. If you ever have the _____ to go abroad to work, you should take it.

　A. possibility B. offer C. luck D. chance