—Do you often go fishing at weekends?—Not often I only go fishing.A. at one timeB. all the

问题补充：

—Do you often go fishing at weekends?

—Not often，I only go fishing.

A. at one time

B. all the time

C. at a time

D. from time to time

答案：

A. at one time

B. all the time

C. at a time

(答案→)D. from time to time

解析：

考查介词短语。at one time曾经；all the time始终；at a time每次；from time to time有时。由句意可知D项正确。