()weekdays I always do my homework in the evening,but()the weekend I often watch TV.A.On;at B.In;at C.On;on D.At;on

问题描述:

()weekdays I always do my homework in the evening,but()the weekend I often watch TV.
A.On;at B.In;at C.On;on D.At;on

A 固定搭配

【On】 weekdays I always do my homework in the evening, but 【at】 the weekend I often watch TV.
A.On

答案是C:On;on