16、Professor Backman took up scientific research for decades, and this is ______ he devoted all his life to.
A．which B．what C．where D．how
科目：高中英語 來源： 題型：
Professor Backman took up scientific research for decades,and this is he devoted all his life to.
A.which B.what C.where D.how
科目：高中英語 來源： 題型：
Professor Backman took up scientific research for decades, and this is ______ he devoted all his life to.
A．which B．what C．where D．how
科目：高中英語 來源：2012年人教版高中英語必修三Unit3練習卷 題型：單項填空
Professor Backman took up scientific research for decades，and this is________he devoted all his life to.
|
A．which |
B．what |
|
C．where |
D．how |
科目：高中英語 來源： 題型：單選題
科目：高中英語 來源： 題型：
Professor Backman took up scientific research for decades (幾十年), and this is ______ he devoted all his life to.
A. which B. what C. where D. how
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