51.　　 Last night some of the tourists____________________by some unknown peole. (attack)

50.　　 We are asking anyone who saw anything unusual last night ______________us. (contact)

49.　　 We must try our best to prevent the money in the bank from _______________of. (rob)

48.　　 I con’t decide whether__________him to the police. (report)

47.　　 There are___________________ strangers walking around the building. (几个)

(B)用所给动词的适当形式填空(8分)

46.　　 He died because of_______________________too much. ( blood)

45.　　 My father is an experienced ____________________in his factory. ( engine)

44.　　 He is among the_______________________ people and very rich. (高收入的)

43.　　 He was put into prison because he was the main_____________ int this case. (crime)

42.　　 The police are advertising on TV for ________________. (wit)