Задание 3 Юнит 15 Рабочая тетрадь ГДЗ Вербицкая Forward 5 класс

Are you a good traveller?

Use must or mustn’t to fill the gaps.

1. When you go hiking through a forest you ______ drop litter.
2. When you leave the hiking camp you ______ leave a fire.
3. When the weather is very hot you ______ wear hats.
4. When you go down a slippery road you ______ be careful.
5. When you go through a tunnel you ______ roller-skate.
6. When you go by boat you ______ load it with too many things.
7. When you are in the mountains you ______ throw stones.
8. When you are on an island you ______ keep it tidy.
9. When you go on board a big ship you ______ show your documents.