I don't often get sick ,but ( ) I do catch a cold

问题描述:

I don't often get sick ,but ( ) I do catch a cold
A.here and here B.again and again C.now and then D.step by step

C 有时,时而
A. 到处B再三的;反复的; D.逐步地
根据语境,C 合适.我不是经常患病,但偶尔会感冒.
祝你学习进步.