---The air would certainly be cleaner if there were fewer cars running in the city.-.A.

问题补充：

---The air would certainly be cleaner if there were fewer cars running in the city.

---.

A. How do you find it ?

B. How are you getting on ?

C. That’s a good point.

D. I managed somehow.

答案：

A. How do you find it ?

B. How are you getting on ?

(答案→)C. That’s a good point.

D. I managed somehow.

解析：考查交际用语：A. How do you find it ?你认为怎么样？B. How are you getting on ?你最近怎样？ C. That’s a good point.是很好的想法。D. I managed somehow.不管怎样我能行。句意：--如果城市里面的汽车更少些，空气一定会更加清洁。--是很好的想法。选C。