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It's very important to listen ________ the teacher carefully in class.

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Please discuss the problem ________ your classmates after class.

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Here is a list ________different learning styles.

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Don't worry ________ your son. He's OK.

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Morning is a good time ________ memorizing information.

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You can work it out ________ another way.

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You should go ________ the lessons every evening.

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There are a number ________ students on the playground.

I am sorry I ________ help you because I am busy.