35. Many people who had seen the film were afraid to go to the forest when they remembered the scenes ______ people were eaten by the tiger.

　 A. in which　　　　　　 B. by which　　　　 C. which　　　 D. that

34. Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

　 A. which　　　　　　　 B. that　　　　　　　 C. what　　　　　　 D. whether

33. -- I've taken someone else's green sweater by mistake.

　 -- It ______ Harry's. He always wears green.

　 A. has to be　　　　　　 B. will be　　　　　 C. mustn't be　　　　 D. could be

32. The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car.

　 A. has been　　　　　　 B. was being　　　　 C. had been　　　　 D. would be

31. He hurried to the station only ______ that the train had left.

　 A. to find　　　　　　　 B. finding　　　　　 C. found　　　　　　 　D. to have found

30. The American Civil War lasted four years ______ the North won in the end.

　 A. after　　　　　　　　 B. before　　　　　　 C. when　　　　　　 D. then