精选优质文档-倾情为你奉上Unit 1 P241. This research seems to lend some validity（有力的）to the theory that the drug might cause cancer .2. In a number of developing countryies ,war has been an additional impendiment (障碍）to progress .3. Anthea was about to play her trump card（王牌卡）;without her signature none of the money could be released .4. I flunked（挂科） my second year exams and was lucky not to be thrown out of college .5. I didnt want to lose my composure（镇静） in front of her .6. The managem
