Most of the developing countries are faced with lots of troubles the financial problem i

问题补充：

Most of the developing countries are faced with lots of troubles , the financial problem is not the worst .

A. which

B. with which

C. that

D. of which

答案：

A. which

B. with which

C. that

(答案→)D. of which

解析：考查非限制性定语从句。the financial problem和troubles是所属关系，应该用介词of；本句是非限制性定语从句。故选D。