3.Tony ________ for the company as an engineer for two decades.Now he teaches mechanics in Peking University.( )
A. | has worked | B. | worked | C. | is working | D. | had worked |
2.A fantastic idea occurred to him __________ he could use a plastic bottle,________cut off,as a container to grow young plants in.( )
A. | which; whose top | B. | that; the top of which | ||
C. | that; with its top | D. | whether; whose top |
1.One third of the area _____ covered with trees.About seventy per cent of the trees_____been planted recently.( )
A. | is; has | B. | is; have | C. | are; has | D. | is; had |
20.The price system is a complex network _______ the prices of all the products bought and sold in the economy as well as those of a great number of services.( )
A. | consisting of | B. | consisted of | C. | making up of | D. | made up |
19.I'm sure your suggestions will ____ the problem( )
A. | contribute to solving | B. | contribute to solve | ||
C. | be contributed to solve | D. | be contributed to solving |
18.Last Sunday I went to visit the History Museum where I saw a pot ______ about 1,000years ago.( )
A. | as it had been | B. | so had it been | ||
C. | what it had been | D. | so it had been |
17.I'd like to work with _______ is honest and easy to get on with.( )
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A. | who | B. | whoever | C. | whomever | D. | no matter who |