The financial crisis and the suffering has caused have a great influence on the whole worl

问题补充：

The financial crisis and the suffering has caused have a great influence on the

whole world.

A. they

B. which

C. it

D. what

答案：

A. they

B. which

C. it

D. what

解析：解答本题的关键是搞清句子的主干，即：The financial crisis and the suffering

have a great influence on the whole world.

it has caused显然是一个省略了that/which的定语从句。句意为：金融危机及其造成的危害给全球带来了巨大的影响。