Question

【题目】I have done everything possible to prevent him from running the risk but ______.

A. in time B. in case C. in vain D. in need

Answer 1

【答案】C

【解析】

试题分析：考查固定搭配。A. in time及时；B. in case以防万一；C. in vain徒劳；D. in need需要。句意：我尽了一切可能(我已经做了一切可能做的事情)来阻止他去冒险，但这只是徒劳的。故选C。