13. Work in pairs. Take turns to choose any two pictures and make up a sentence using them with the words when, while, and as.
Example: When we were playing football, we saw a plane in
the sky.

If your sentence is correct, you get one point. Note that you cannot
use the same picture twice.​

A) A lot of rubbish that is a real danger to health is floating in the sea.
A lot of rubbish is floating in the sea and it is a real danger to health.
b) The problem of soil erosion which has occured ever since the man began to destroy forests is discussed in this chapter.
The problem of soil erosion has occured ever since the man began to destroy forests and is discussed in this chapter.
c) Nuclear energy comes from the energy stored within the nuclei of atoms which are the basic building blocks of all matter.
Nuclear energy comes from the energy stored within the nuclei of atoms and they are the basic building blocks of all matter.
d) The best things in life such as water and air which we often take it for granted are free.
The best things in life such as water and air are free and we often take it for granted.
e) The manufacture of one PC requires 28kg of liquid chemicals which have to be neutralized by a further 11 kg of sodium hydroxide.

Давайте очистим местность вокруг.
Смотри.Здесь очень много мусора около реки,мы можем убрать его.
А как насчет стереть графити?
Я не думаю что это звучит интерестно.Мы можем детям в местной больнице.
Что мы можем сделать для них?
Мы можем сшить мягкие игрушки и собрать старых книжек.
И еще мы можем поиграть с ними.Я могу показать им парочку фокусов.
Это отличная идея.Мы можем старым и одиноким людям.
Это верно!Давай им вымыть окна,дома,сады и ...
И мы можем убрать листья и полить цветы в саду.
И мы можем им сходить в магазин.(или сделать покупки за них)