I can't keep ___ the teacher who speaks so fast .A.up with B.on w_英语解答

I can't keep ___ the teacher who speaks so fast .
A.up with B.on with

人气：393 ℃　时间：2019-12-10 00:21:56

解答

keep up with跟上.的节奏
老师讲得很快.我跟不上老师的节奏