I know the new airport runway has been under construction for nearly two years. A. As lo

问题补充：

I know, the new airport runway has been under construction for nearly two years.

A. As long as

B. So long as

C. As far as

D. So far for

答案：

A. As long as

B. So long as

(答案→)C. As far as

D. So far for

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