17、Venus has a dense atmosphere, _____ we know very little.                  

A. its composition                              B. whose composition

C. about which composition                D. about whose composition

 

17、D

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科目：高中英語 來源： 題型：

Venus has a dense atmosphere, _____ we know very little.                  

A. its composition                              B. whose composition

C. about which composition                D. about whose composition

 

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科目：高中英語 來源： 題型：

Venus(金星) has a dense atmosphere, ______ we know very little.

    A. its composition                             B. about whose composition

 C. about which composition                          D. whose composition

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