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Christopher (c)________ (a)_________ pictures of his elementary school classmates in the school's Facebook group yesterday.

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came across

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Mike is just fired by his boss, and I think this ______ (r)________ _____ his poor performance at work.

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is related to

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Robert (l)_______ (t)________ his classmates' comments on Instagram while waiting for the bus.

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looked through

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(I)_____ (r)________ ____ Aubrey's plan to transfer to another school, she will discuss it with her parents and teachers. 關於 Aubrey 想轉學的計畫，她會和她父母及老師們討論。

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In regard to

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The trend of wearing jeans can ____ (t)_______ (b)______ to the 19th century.

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be traced back