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19.Its 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 | 
