问题
Are they working? —No, they are talking ______ the phone.[ ]
A: in
B: at
C: on
D:for
B: at
C: on
D:for
正确答案是：
同类题型
Excuse me, look at the sign “No parking”. —Sorry, I ________ it.
I find __________ very difficult to learn English well .
What color is our national（国家的）flag(旗帜)? It’s ________.
You drive on the right of the road in China. It’s the traffic rule.
It was stupid ____ him for help. Everyone knows that he is very mean.