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12、He was so deep in thought, thinking of the problem ____ he knocked into the tree without  noticing it．

A．when         B．while           C．because          D．that

12、D

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科目：高中英語 來源： 題型：

8. He was so deep in thought, thinking of the problem ______ he knocked into the tree without  noticing it.

A. when                B. while                C. because             D. That

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科目：高中英語 來源： 題型：

 He was so deep in thought, thinking of the problem ________he knocked into the tree without noticing it.

       A. when         B. while               C. because            D. that

查看答案和解析>>

科目：高中英語 來源： 題型：

 He was so deep in thought, thinking of the problem _________he knocked into the tree without noticing it.

       A. when         B. while               C. because            D. that

查看答案和解析>>

科目：高中英語 來源： 題型：

He was so deep in thought, thinking of the problem ____ he knocked into the tree without  noticing it．

A．when         B．while           C．because          D．that

查看答案和解析>>

科目：高中英語 來源：四川省資陽市2010屆高三下學(xué)期第二次模擬考試 題型：單選題


8. He was so deep in thought, thinking of the problem ______ he knocked into the tree without  noticing it.

A．whenB．whileC．becauseD．That

查看答案和解析>>

科目：高中英語 來源：2013-2014學(xué)年高考二輪復(fù)習(xí)訓(xùn)練：專題7 并列句與狀語從句英語試卷（解析版） 題型：單項(xiàng)填空

He was so deep in thought，thinking of the problem ________ he knocked into the tree without noticing it.

A．when? B．while

C．because? D．that

 

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