returning from abroad, he set about setting up a club for young climbers.A. UponB. AtC. I

发布时间：2020-08-16 14:22:33


     returning from abroad, he set about setting up a club for young climbers.
A. Upon
B. At
C. In
D. During

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(答案→)A. Upon
B. At
C. In
D. During
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