The classroom is empty, so the students have gone to the laboratory.(5.0)(5.0) ( 5.0)

单选题

The classroom is empty, so the students___have gone to the laboratory.(2.0)

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单选题

The classroom is quite clean _____ some waste paper on the floor.

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单选题

You must clean the classroom, you?

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单选题

All the people in the classroom are frustrated() the few who have passed the test.

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多选题

_______, they made for the classroom in a hurry.

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