If you keep working so hard I think you will succeed.A. in time B. on timeC. at timesD. a

问题补充：

If you keep working so hard, I think you will succeed.

A. in time

B. on time

C. at times

D. at a time

答案：

(答案→)A. in time

B. on time

C. at times

D. at a time

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