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 Wearethankfultothosewhosupporteduswhenwewere

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问题详情:

 Wearethankfultothosewhosupporteduswhenwewere

 We are thankful to those who supported us when we were __________ trouble.

A. in                B. by               C. about                  D. for

【回答】

A

知识点:介词和介词短语

题型:选择题

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