问题

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

正确答案是：

同类题型

The boss of the company is trying to create an easy atmosphere ______ his employees enjoy their work.

Have you ever met a group of ____ on the bus —Yes, I have.

His first novelgood reviews since it came out last month

It isn’t like a duck to water to learn a foreign language , so you must study hard.

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