1.
It was their belief that:
2.
Human beings had to' shift underground as:
3.
Tilloo's father told him about a time when:
4.
The scientists at NASA were disappointed as:
5.
TV Screen in the Control Room showed:
6.
To survive on Mars, people needed:
7.
Tilloo was advised:
8.
After emerging from his underground home, Tilloo hoped:
9.
Tilloo managed to find his way to the forbidden passage: