By far there are many problems to be solved.A. remainingB. remainedC. being remainedD. t

问题补充：

By far, there are many problems to be solved.

A. remaining

B. remained

C. being remained

D. to remain

答案：

(答案→)A. remaining

B. remained

C. being remained

D. to remain

解析：本题考查remain的用法。句意：迄今为止还剩下许多问题需要解决。remaining用作形容词，作“剩下的”。

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