问题
Sometimes I work _____ the day and sometimes _____ night. [ ]
A: on, at
B: at, on
C: at, in
D:in, at
B: at, on
C: at, in
D:in, at
正确答案是：
同类题型
Now, everybody, please turn to page _________and look at the ___picture.
________ can you finish this English examination?– In about one and a half hours.
You can ________ in a parking lot.
I’m Bob. What’s your name?—Mary. How are you?
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