_____ his return from Europe, he set to work on the project.

A. As
B. At
C. Upon
D. For
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科目：高中英語 來源：0110 月考題 題型：單選題

_____ his return from Europe, he set to work on the project.
[     ]
A. As
B. At
C. Upon
D. For

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科目：高中英語 來源：2015屆江蘇省高一下學(xué)期期初考試英語試卷（解析版） 題型：單項填空

______ his return from Europe , he set to work on the project..

A．As               B．At               C．Upon             D．For

 

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