his return from Europe , he set to work on the project..A. AsB. AtC. UponD. For

发布时间：2020-08-17 02:17:48

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

网友回答

A. As
B. At
(答案→)C. Upon
D. For
解析：考查介词：upon+名词或动名词，表示“一…就…”,句意：他一从欧洲回来，就着手开始这个课程。选C。
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