It's rather cold in most of south China------in springA on the time B at a timeC at times D all the time

问题描述:

It's rather cold in most of south China------in spring
A on the time B at a time
C at times D all the time

A

B有“每次,一次”或“在某个时刻”的意思
C是“有时”
D是“一直”
A选项我没有见过.
句子大意为“中国大部分南方地区的冬天有时非常冷.”
选C