Keep on trying you’ll succeed A. and; on timeB. or; at one timeC. and; in timeD. or; all

问题补充：

Keep on trying, you’ll succeed

A. and; on time

B. or; at one time

C. and; in time

D. or; all the time

答案：

A. and; on time

B. or; at one time

(答案→)C. and; in time

D. or; all the time

解析：可联系答.案.网客服索取。