Now the world’s attention the stocking markets as they have great influence in the world

问题补充：

Now the world’s attention the stocking markets, as they have great influence in the world’s economy.

A. is fixing on

B. has fixed on

C. is being fixed on

D. had been fixed on

答案：

A. is fixing on

B. has fixed on

(答案→)C. is being fixed on

D. had been fixed on

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