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    (   ) 15.       I walked into class,the teacher had started teaching already. 

    A. By the time   B. While   C. After   D. Because

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    Tom is a boy of fifteen. His parents 41.        (die) two years ago,and he had to make a living by himself. Now he 42.       (work) as a servant at Mr. Jackson's. He works hard and Mr. Jackson is pleased with him. 

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    ('    ) 9.A. say   B.  says

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    9.We were surprised at what she already       (do) .

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