Exercise 4. rewrite the following text using passive instead of active. some people saw a ufo in the sky above london last night. they reported 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.

A UFO was seen in the sky above London last night. They police were reported to. A helicopter was sent by the army to look at it more closely. The helicopter was shot down and both men in it were killed by the UFO. The police has been given photographs of the UFO. Now they are being looked at by experts.