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13.(  ) A. in the front of   B. behind  C. at front       D. in front of

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12.(  ) A. old    B. new      C. useful       D. good

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11.(  ) A. using    B. use      C. to use       D. used

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10.(  ) A. For    B. By       C. In         D. On

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9.(  ) A. seeing    B. to see      C. looking      D. to look

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8.(  ) A. mustn't    B. can't      C. needn't       D. shouldn't

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7.(  ) A. his own    B. their own    C. own his      D. own their

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6.(  ) A. become    B. will become  C. turn        D. will turn

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5.(  ) A. what     B. when     C. how        D. where

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4.(  ) A. began     B. has begun   C. have begun     D. will begin

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