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题型：单选题题类：常考题难易度：普通

—Please remember ________ the lights when you leave.

—OK, I will.

A、turn off B、to turn off C、turning off

举一反三

Don't forget ____________ your photos here when you come to school.

It's impolite ____information directly when asking for help.

请告诉我如何解出这个数学题。

Please tell me{#blank#}1{#/blank#} {#blank#}2{#/blank#} work out the math problem.

We have worked for three hours. Now let's stop a rest.

While we were running on the playground, Jack suddenly stopped ____ and lay on the ground, so we all stopped ____ what was wrong with him.

Tomorrow is my birthday, but I don't know who {#blank#}1{#/blank#} (invite).

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