Mark Twain was ________ American writer.

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Tom is often late for class. His teacher is angry ________ him.

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Please ________ your boots on the floor and put ________ under the bed quietly.

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While Jim ________ his bike , the bell rang.

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Physics is ________ difficult ________ maths.

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Not all the students are in the classroom and ________ are playing football on the playground.

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Can you make ________ for the old man?

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Very ________ people understand what he said.

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I don't know ________ is the tallest student in our school.

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Could you make ________ for the old woman?

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