If you keep on, you will succeed .A. in timeB. at one timeC. at the same timeD. on time

If you keep on, you will succeed .
A. in time
B. at one time
C. at the same time
D. on time

(答案→)A. in timeB. at one timeC. at the same timeD. on time解析：考查介词短语。A及时，迟早；B曾经；C同时；D准时；句意：如果你继续努力，你迟早会成功的。根据句意说明A正确。

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