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题型：单选题题类：难易度：普通

（典中点）人教版（PEP）五年级上册Unit 2 单元重难点提优专训(1) 时间介词 at, in, on的用法

____ a cold winter morning, I met my friend, Diandian.

A、In B、On C、At

举一反三

Please send me an email ________ robin@urfriend. cn.

—What ____ our city dirty?

—Smoke ____ the cars.

Bill found a coin on the floor and he picked it ________ quickly.

—________ lessons do you have ________ Tuesday morning?

—We have three.

Go straight_________. The school is next_________ the hospital.

The train is not down the hill. It's ____ the hill.

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