We can surely overcome these difficulties _ we are closely united.A. so far asB. so long

问题补充：

We can surely overcome these difficulties _, we are closely united.

A. so far as

B. so long as

C. as soon as

D. as well as

答案：

A. so far as

(答案→)B. so long as

C. as soon as

D. as well as

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