问题
Mr. Black is working ______ his project at home. [ ]
A: to
B: on
C: in
D:at
B: on
C: in
D:at
正确答案是：
同类题型
I don’t have a partner to practice English___ on the weekend.[ ]
Oh, it tastes quite good. May I have _________ cup of coffee? —OK. Here you are.
The is a little difficult for me.
Must I feed the goldfish now? — No, you ______. But you must do it before supper.
All of us are interested _____ music. We often listen to it on our way.[ ]