1.He has studied American ________ (文学) for many years.

2.These visitors are going to travel in some _______ (南方) provinces of China.

3.This is a ________ (社会的) problem. It’s not easy to be solved(解决).

4. In old days, many people fought for their _______ (自由).

5.She was still ________ (活着的) when I reached the hospital.