______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.

A．BasingB．BasedC．Been basedD．Having based

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_____on ten years of observation and study,Professor Wang announced that everyone dreams every night, whether they realize it or not.

A.Basing   B.Based   C.Been based    D.Having based

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科目：高中英語 來源：遼寧省2009-2010學(xué)年高二下學(xué)期3月月考試題（英語） 題型：單項(xiàng)填空

 

______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.

A. Basing       B. Based          C. Been based    D. Having based

 

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科目：高中英語 來源：四川省同步題 題型：單選題

________on ten years of observation and study,   Professor Wang announced that everyone dreams
every night,   whether they realize it or not.
[     ]
A. Basing  
B. Based
C. Been based  
D. Having based

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科目：高中英語 來源： 題型：

______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.

A. Basing       B. Based          C. Been based    D. Having based

查看答案和解析>>

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