问题

They do some exercises ______ Friday morning. [ ]
A: on
B: in
C: at
D:to
B: in
C: at
D:to
正确答案是:
同类题型
I think the race is ________than before.
I’m busy now. I ______ to you after school this afternoon.
______ will you finish your work? It’s quite late now. —Please wait for another two hours.[ ]
_____ do you go to Beijing Happy Valley? —Once a year. [ ]
The first question was difficult, but the rest were pretty easy.