(   )1. Where did Zhan Tianyou build the railroad?

A. In mountains.              B. In tunnels.                   C. On bridges.

(   )2. Why did she say that excuse?

A. Her hand hurt.             B. Her head hurt.             C. We don’t know.

(   )3. How long did Yang Liwei train for an astronaut?

A. Five years.                  B. Five months.               C. Eight years.