There was _______ to prevent the accident.
A.something could do
B.anything we could do
C.nothing we couldn't do
D.nothing we could do
网友回答
D解析当定语从句修饰的那个先行词是all, everything, nothing, something等不定代词，或有only, that这类词修饰，或者先行词前有最高级的形容词修饰时，关系代词要作that, that可省略．