问题
选择题
It is hard to __________ the green beans from the red ones, because there are too many of them.[ ]
A. work out
B. watch over
C. sort out
D. set down
答案
答案：C
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It is hard to __________ the green beans from the red ones, because there are too many of them.[ ]
A. work out
B. watch over
C. sort out
D. set down
答案：C