Hamburgers are food from America and they ________ very delicious.

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--Who set the clock?

--The clock ________ by my mom.

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Computers ________ last century.

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Rules should ________ in your school.

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Don't worry. The plane will arrive ________ one hour.

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It ________ him 5 hours ________ back home.

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There are fifteen cars ________that train.

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________ by train is interesting.

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