All the students__________ to plant trees and there’s nobody in the classroom.A．

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All the students__________ to plant trees and there’s nobody in the classroom.

A．go

B．will go

C．have gone

D．wound go

答案

解析

略

举一反三

Stop! A little boy_________ the street.

A．is crossing

B．crosses

C．crossed

D．has crossed

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The girl________ to milk since last winter.

A．learns

B．learned

C．has learned

D．would learn

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What__________ to you this morning?

A．happens

B．is happened

C．happened

D．was happened

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—The old man looks healthy.
—Yes. He________ some running after he gets up.

A．does

B．did

C．has done

D．will do

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She didn’t pass the exams because she________ her lessons well.

A．wasn’t prepared	B．wasn’t been prepared
C．hadn’t prepared	D．was preparing

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