问题
选择题
Sometimes I work ________ the day and sometimes _________ night.
A．on, at
B．at, on
C．at, in
D．in, at
答案
答案：D
在白天用介词during或in，而在夜晚用介词at，故选答案为D
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Sometimes I work ________ the day and sometimes _________ night.
A．on, at
B．at, on
C．at, in
D．in, at
答案：D
在白天用介词during或in，而在夜晚用介词at，故选答案为D