41.His proposal is very _______. We do not need any explanation.

　　A. concrete B.loyal C.grey D.draft

　　42.This is a _______ computer, which we just bought for our research.

　　A. detective B.luggage C.digital D.grave

　　43.The two pictures are _______. We don’t know which is the copy.

　　A. identical B.likely C.limited D.resemble

　　44.If you don’t want to wash your jacket, you may send it to a _______.

　　A. participant B.planet C.laundry D.ribbon

　　45.If the _______ in the test is too small, we can not get a good result.

　　A. sample B.percent C.leisure D.flight

　　46.I am very _______. You may tell me your suggestion.

　　A. fog B.debate C.culture D.flexible

　　47.This is a very big hotel and it can _______ more than 1,000 people.

　　A. accommodate B.display C.faint D.loaf

　　48.Professor Li _______ in doing his experiment for nearly ten years.

　　A. insisted B.piled C.persisted D.split

　　49.The new plan is _______ and everybody present agrees with it.

　　A. feasible B.adventure C.appendix D.camel

　　50.Please be _______. Your question is too general.

　　A. limited B.narrow C.specific D.thorough

　　答案:

　　41.A 42.C 43.A 44.C 45.A 46.D 47.A 48.C 49.A 50.C