--Hey, Tony, You look so tired today.      ---I __ until 12 o clock last night f

--Hey, Tony, You look so tired today.      ---I __ until 12 o clock last night for the math test.

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From then on, Jack and Timmy ______ (become) friends.

From then on, Jack and Timmy ______ (become) friends.

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Hospital doctors don`t go out very often as their work ____all their time.

Hospital doctors don`t go out very often as their work ____all their time.

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在△ABC中,AC=AB,∠BAC=α,D为线段AB上的动点,连接DC,将DC绕点D顺时针旋转α得到DE,连接CE,BE.

在△ABC中,AC=AB,∠BAC=α,D为线段AB上的动点,连接DC,将DC绕点D顺时针旋转α得到DE,连接CE,BE.

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