大学英语四级词汇训练500题4(3)

A.accused B.witnessed C.strained D.found

48.Metals expand when they are heated and _______ when cooled.

A. indicate B.eliminate C.conquer D.contract

49.In order to _______ a good knowledge of English, he gave up his job and went to study in an English school.

A.require B.inquire C.acquire D.address

50.He checked carefully to _______ the possible errors in his design.

A.eliminate B.exceed C.enlarge D.vibrate

答案:
1.C 2.C 3.C 4.A 5.B 6.C 7.A 8.C 9.D 10.D 11.B 12.D 13.C 14.B 15.C 16.C 17.B 18.D 19.A 20.B 21.C 22.D 23.C 24.D 25.C 26.C 27.A 28.B 29.C 30.A 31.D 32.D 33.B 34.C 35.C 36.B 37.C 38.C 39.B 40.C 41.D 42.C 43.A 44.D 45.D 46.C 47.A 48.D 49.C 50.A