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

A. concrete B.loyal C.grey D.draft

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

答案：D A D A C     A D C C A