The price but I doubt whether it will remain so.A. went downB. will go downC. has gone d

问题补充：

The price , but I doubt whether it will remain so.

A. went down

B. will go down

C. has gone down

D. was going down

答案：

A. went down

B. will go down

(答案→)C. has gone down

D. was going down

解析：考查时态。句意价格已经下降了，但是我怀疑它是否会保持下去。价格下降是过去的动作持续到现在，故用现在完成时态。选C。