кузовлев 7 класс 20 стр lesson 6 unit 1 C

You sould eat more food.
Children of your age have to eat more food.
If you want know english better, you should spend more time warking with your dictionary.
They should learn the rules of using the library.
Students should return themselfs(возвращаться)/return books(возвращать книжки) to the library in time. (Вообще-то, "in time" это вовремя, но как переводится "належний час" я не знаю.)
We should work hard if we want have time to watch the concert.
He should not ride a bike in (или "at") the street, where is heavy traffic.
You should not use dictionaries during your examination of tests.

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.