Reading Comprehension 2

1. Philadelphia no longer locates pipes or cables underground.

• True

• False

2. The collapse of underground structures sometimes kills people traveling on the surface.

• True

• False

3. William Penn carefully planned Philadelphia's underground environment in the 1680s.

• True

• False

4. Some residents of Philadelphia today use underground structures to hide things from city officials.

• True

• False

5. Old infrastructure is easier to locate than new infrastructure.

• True

• False

6. GPR can detect even non-metal items.

• True

• False

7. By using GPR, the police easily recaptured twelve escaped prisoners.

• True

• False

8. Systems like Responder use radar or sonar to find out where old sewers are.

• True

• False

9. Robots can discover problems by looking at pipes from the inside.

• True

• False

10. The sewers under the White House were fixed by creating new pipes inside old ones.

• True

• False