Who is he?
The Centurion lent Doctor Who his ear since he had saved the Centurion's life.

OPTIONS:
- The Centurion
- Doctor Who

A:
Doctor Who

Who is it?
The rock melted in the lava because it was hot.

OPTIONS:
- The rock
- the lava

A:
the lava

Who is it?
The plane shot the rocket at the target, then it hit the target.

OPTIONS:
- the rocket
- the target

A:
the rocket