Wearethankfultothosewhosupporteduswhenwewere

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