2020年GMAT考试语法巩固练习（13.2）

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语法练习：

6. It is possible that Native Americans originally have migrated to the Western Hemisphere over a bridge of land that once existed between Siberia and Alaska.

（A） have migrated to the Western Hemisphere over a bridge of land that once existed

（B） were migrating to the Western Hemisphere over a bridge of land that existed once

（C） migrated over a bridge of land to the Western Hemisphere that once existed

（D） migrated to the Western Hemisphere over a bridge of land that once existed

（E） were migrating to the Western Hemisphere over a bridge of land existing once

7. As envisioned by researchers， commercial farming of lobsters will enable fisheries to sell the shellfish year-round， taking advantage of off-season demand， standardize its sizes and colors， and to predict sales volume in advance.

（A） taking advantage of off-season demand， standardize

（B） taking advantage of off-season demand， to standardize

（C） taking advantage of off-season demand， standardizing

（D） take advantage of off-season demand， standardizing

（E） take advantage of off-season demand， to standardize

 8. It is an oversimplified view of cattle raising to say that all one has to do with cattle is leave them alone while they feed themselves， corral them， and to drive them to market when the time is ripe

（A） all one has to do with cattle is leave them alone while they feed themselves， corral them， and to

（B） all one has to do with cattle is to leave them alone to feed themselves， to corral them， and

（C） all one has to do with cattle is leave them alone while they feed themselves and then corral them and

（D） the only thing that has to be done with cattle is leave them alone while they feed themselves， corral them， and

（E） the only thing that has to be done with cattle is to leave them alone while they feed themselves， to corral them， and

9. In recent years cattle breeders have increasingly used crossbreeding， in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.

（A） in part that their steers should acquire certain characteristics

（B） in part for the acquisition of certain characteristics in their steers

（C） partly because of their steers acquiring certain characteristics

（D） partly because certain characteristics should be acquired by their steers

（E） partly to acquire certain characteristics in their steers

10. As the etched lines on computer memory chips have become thinner and the chips‘ circuits more complex， both the power of the chips and the electronic devices they drive have vastly increased.

（A） the chips‘ circuits more complex， both the power of the chips and the electronic

devices they drive have

（B） the chip‘s circuits more complex， the power of both the chips and the electronic

devices they drive has

（C） the chip‘s circuits are more complex， both the power of the chips and the

electronic devices they drive has

（D） their circuits are more complex， the power of both the chips and the electronic

devices they drive have

（E） their circuits more complex， both the power of the chips and the electronic

devices they drive have

答案： 6.D 7.B 8.C 9.E 10.B

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