中文谷Theyoungmanbearshimselfwithwisdomandcourage.Severaltim...
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问题详情：
The young man bears himself with wisdom and courage. Several times already he ______ particularly valuable to the company.
A. is proving B. is proved C. has been proved D. has proved
【回答】
D
知识点：动词时态与语态
题型：选择题
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