问题
Mr Black is a hardworking engineer. He often stays up late _____ night. [ ]
A: at
B: on
C: about
D:to
B: on
C: about
D:to
正确答案是：
同类题型
Where are your brothers?—________ in the classroom.
Must I do the rest of the work today?— No, you _________finish it tomorrow.
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We read 10,206 like this:_____________
How does your father learn Chinese, Jim? —He learns it _____ listening to the radio.[ ]