高人帮我回答下这道托福口语题吧··

I'm a Chinese student.My country has made tremendous strides on economy.The most impressive policy is the reform and opening-up policy created by Deng Xiaoping,which is a self-improvement and development of the socialist system in China.Since then,China expands import and export trade,which greatly increase the oppotunities to exchange with other countries.We learn about the way to solve economic problems from other countries,which contributes a lot to our economic development.