20、It is natural that____ student doesn't know some answers to____ questions raised by their teachers．

A．a(chǎn); a        B．a(chǎn); the          C．the; a        D．the; the

20、B

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科目：高中英語 來源： 題型：

11. It is natural that____student doesn't know some answers to____questions raised by their teachers.

A.a;a    B.a;the    C.the;a    D. the; the

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科目：高中英語 來源： 題型：

It is natural that____ student doesn't know some answers to____ questions raised by their teachers．

A．a(chǎn); a        B．a(chǎn); the          C．the; a        D．the; the

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