Mary and I see each other but not as often as we used to. A. sooner or laterB. in a whil

问题补充：

Mary and I see each other , but not as often as we used to.

A. sooner or later

B. in a while

C. sometime

D. now and then

答案：

A. sooner or later

B. in a while

C. sometime

(答案→)D. now and then

解析：由后句关键词：not as often as推出此处为时而---。