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The computer can work again!________ it ________(repair)by you just now?

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When I grow up, I ________(be)a doctor and help the patients．

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We can never follow the fashion because it ________(change)all the time．

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－Tell me how long you ________(have)a cold．

－Ever since last night．

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As a student, he is often told ________(study)hard．．

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Tom said that he ________(visit)the Palace Museum with his good friends the next day．

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Bad weather ________(cause)natural disaters from time to time．

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Get it now before all the copies ________(sell)out．

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Miss Green ________(teach)English for nearly 5 years before she moved here．

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My father with his friends ________(talk)about their work at this time yesterday．