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题型：单选题题类：常考题难易度：容易

——Did you write an e-mail ____ your online friend yesterday?
——Yes. But I didn't hear ____ him.

A、from; to B、to; of C、to; to D、to; from

举一反三

The policeman often helps the old woman walk _____________ the bridge.

Qinghe Park is quite beautiful with a river running _______ it and there are many bridges _______ the river.

I can see a watch ____the desk.

Jack was helping his mother when the rain began to beat heavily______the windows.

People can't live _______ air or water.

—Where is Mary flying?

—She is flying to France soon. She will arrive Paris the morning of July 2.

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