Exercise 12. Rewrite the following passage into Passive.
Some people saw a UFO in the sky above London last night. They reported it to the police. The army sent a helicopter to look at it more closely. The UFO shot the helicopter down and killed both men in it. People have given photographs of the UFO to the police. Experts are looking at them now.

1)    Some people saw a UFO in the sky above London last night.

A UFO in the sky above London was seen by some people last night.

2)    They reported it to the police.

The police was reported about it.

3)    The army sent a helicopter to look at it more closely.

A helicopter was sent by the army to look at it more closely.

4)    The UFO shot the helicopter down and killed both men in it.

The helicopter was shot down by the UFO and both men in the helicopter were killed.

5)    People have given photographs of the UFO to the police.

The police have been given some photographs of the UFO by the people.

6)    Experts are looking at them now.

They are looking by experts now.