The Turners consider a computer which is commonly considered a great help in our work a

问题补充：

The Turners consider a computer, which is commonly considered a great help in our work and study.

A. to buy; to be

B. buying; to be

C. to guy; being

D. buying; being

答案：

A. to buy; to be

(答案→)B. buying; to be

C. to guy; being

D. buying; being

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