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Mrs．Smith had much difficulty ________ preparing a report

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If you want to apply ________ the job, just have a try．

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The sun will rise from your left and pass ________ your head to set on your right

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The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed ________ my memory．

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Officials believe that more than one person is to blame _______ the big fire．

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I felt worried ________ the result of the final exam．

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As a teacher, he is not only strict ________ his students but also strict about his work．

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Since everything develops, we have to make adjustment ________ the changing situation．

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他离成为一名著名歌手已经不远了。

He is on his way ________　________ a famous singer．

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昨天，我看见他和另一个男孩彼得说话，我忍不住想他是不是想让彼得取代我做他最好的朋友。

Yesterday, I saw him talking to another boy, Peter, and I cannot ________　________ if he wants Peter to be his best friend instead of me．