问题
We usually do some cleaning _____ weekends. [ ]
A: for
B: on
C: over
D:in
B: on
C: over
D:in
正确答案是：
同类题型
A Tale of Two Cities is ______ a novel. It helps us to understand the history of that time.
As we all know，dark glasses can ________ the eyes from strong sunlight.
You have made great progress recently. —______. [ ]
His father looks young, but in fact he is ______.
Jenny went out of the classroom _______ saying a word. She was really angry. [ ]