1.The price of beerfrom 50 cents to4per liter during the summer season. A.altered B.ranged C.separated D.differed 2.The police set ato catch the thieves. A plan B.device C.trap D.trick 3.John often attends public lectures at the University of Oxford,chiefly_his English. A.to improve B.improving C.to have improved D.improved 4.Sir Dennis,who is 78,has made it known that much of his collectionto the nation. A.has left B.leaves C.is to leave D.is to be left 5.lt was very kind of you to the washing-up.but you A.mustn't have done B.wouldn't have done C.mightn't have done D.didn't have to do 6.He gives people the impression all his life abroad. A.of having spent B.to have spent C.of being spent D.to spend 7.Before the first nonstop flight made in 1949,itnecessary for all planes to land for refueling. A.would be B.had been C.has been D.would have been 8.It was suggested at the meeting that effective measuresto solve the problem. A.were taken B.be taken C.has been D.would have been 9.His remarks left meabout his real purpose. A.wondered B.wonder C.to wonder D.wondering 10.We have to try every means to the costs of the construction project. A.bring off B.bring forth C.bring down D.bring back 11.No matter how frequently _,the works of Beethoven always attract large audiences. A.performing B.performed C.to be performed D.being performed1.The price of beer _from 50 cents to ＄4 per liter during the summer season. A. altered B. ranged C. separated D. differed 2.The police set a_to catch the thieves. A. plan B. device C. trap D. trick 3.John often attends public lectures at the University of Oxford,chiefly_his English. A. to improve B. improving C. to have improved D. improved 4.Sir Dennis,who is 78,has made it known that much of his collection_to the nation. A. has left B. leaves C. is to leave D. is to be left 5.It was very kind of you to the washing-up,but you _it. A. mustn't have done B. wouldn't have done C. mightn't have done D. didn't have to do 6.He gives people the impression _all his life abroad. A. of having spent B. to have spent C. of being spent D. to spend 7.Before the first nonstop flight made in 1949,it_necessary for all planes to land for refueling. A. would be B. had been C. has been D. would have been 8.It was suggested at the meeting that effective measures_to solve the problem. A. were taken B. be taken C. has been D. would have been 9.His remarks left me _about his real purpose. A. wondered B. wonder C. to wonder D. wondering 10.We have to try every means to _the costs of the construction project. A. bring off B. bring forth C. bring down D. bring back 11.No matter how frequently _,the works of Beethoven always attract large audiences. A. performing B. performed C. to be performed D. being performed