The financial crisis(危机) and the suffering has caused have a great influnce on the whole world.
A. they
B. it
C. which
D. what
网友回答
A. they
(答案→)B. it
C. which
D. what
解析：金融危机以及它所带来的灾难”对整个世界造成了很大影响。整个句子的主语是the financial crisis and the suffering，the suffering后面引导一个定语从句。定语从句先行词是the suffering，在定语从句里充当的是cause这个词的宾语，用which或that,可以省略。而主语其实是the financial，但是为了避免重复，在定语从句里用代词“it”来替代“the financial”。所以整个定语从句真正缺少的是句子的主语“it”，而which这个引导词则省略了。