1 The reaearch has produce clear evidence_D___ these chemicals are damaging the environment A indicates B indicated C indicating D to indicate分析:这句话的意思是:这个研究已经提供了清晰的证据来阐述这些化学物质在危害环境。2 Three papers with similar answers were discovered when the paper ___C___A were marked B had been marked C were being marked D were being larking解释:句子大意:在批改试卷的时候,发现了3份答案相似的试卷。3_A___you need any help. you can always phone me at the officeA would B might C could D should句子大意:如果你需要任何帮助,你可以在办公室随时打我电话。4 __a____happened to have been so much to do that day that I was not able to help you with the wedding.A It B there C what D As分析:it happened to do sth(碰巧发生)5.He stopped at the door, waiting ____B__for her to acknowledge his presenceA in turn(按顺序) B in return(回应) C in favor(帮忙) D in vain (徒劳)6.Remember never to do __B_ is forbidden by the school authorities and that is the key to ___ you can get along well in schoolA that;how B what; how C how; what D what ;whether分析:后面是how,意思是:这就是你怎么在学校里面能够过得好。所以排除C,D;而在前一局当中,what是作为先行词。7___D___others might have been satisfied ,Tom had higher ambitionsA what B where C unless D before分析:这里是完成时,故用before8 The whole class came to _____life the moment they heard the bell ring,announcing _____D_breakA X;a B the ;X C X;X D X;the分析:句子大意:整个课堂的学生在听到下课铃响,宣布休息的时候活跃起来。9The man spy passed himself off as a pregnant woman at the security check-up ,___C__was altogether beyond usA as B that C which D what