问题
选择题
They ___ work in the day, but ___ at night.[ ]
A. sometime, sometimes
B. sometimes, sometimes
C. some times, sometime
D. sometime, some times
答案
答案：B
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They ___ work in the day, but ___ at night.[ ]
A. sometime, sometimes
B. sometimes, sometimes
C. some times, sometime
D. sometime, some times
答案：B