As long as you stick to it you’ll make progress .A. in timeB. at a timeC. at one timeD. o

问题补充：

As long as you stick to it,you’ll make progress .

A. in time

B. at a time

C. at one time

D. on time

答案：

(答案→)A. in time

B. at a time

C. at one time

D. on time

解析：in time及时,总有一天；at a time每次；at one time从前,曾经；on time按时。