The air quality in Beijing as well as in the neighboring cities we once spent much time be

问题补充：

The air quality in Beijing as well as in the neighboring cities we once spent much time better and better.

A. in getting

B. having got

C. in is getting

D. has got

答案：

A. in getting

B. having got

(答案→)C. in is getting

D. has got

解析：“我们曾经度过好多时间的北京和周围城市的空气质量越来越好了。”句子主干是The air quality is getting better and better.答案C。