What ispulmonary fibrosis?

This disease makes people feel very hard to breath. For those people, every breath is a fight to survive.

A. 对
B. 错

Can scientists find a way to cure pulmonary fibrosis in these days?

A. 对
B. 错

Who can easiler suffer pulmonary fibrosis?

A. the people who are 50 years old.
B. the people who are over 50 years old.
C. the people who are less than 50 years old.