19.It's very dufficult to ____ the exact meaning of an idiom in a foreign language.
A.exchange B.transfer C.convey D.convert

20.When we are reading,the important thing is to ____ the essential meaning,not to learn every single word.
A.clasp B.grab C.grasp D.grapple

21.Calipers are instruments that can be used to ____ the distance between two surfaces.
A.count B.measure C.figure D.calculate

22.The twins are so much alike that people find it difficult to ____ one from the other.
A.separate B.compare C.choose D.distinguish

23.Before I bought the jeans,I asked if I could ____ them on.
A.put B.wear C.try D.have

24.Harvard University has been ____ the best university in a recent annual survey.
A.listed B.catalogued C.ranked D.classified

答案：C C B D C C
19.transfer转移，改变 convey传达，表达，传播
20.clasp扣子，扣紧，拥抱 grab抓取，强夺，捕获 grasp理解，领会，掌握 grapple抓住，握紧
24.catalogue目录 rank给...评级，列为，居首位