Look and write the correct words. There is one example.

from ; means ; in ; waste ; possible ; wind ; should ; green ; However ; who

Much of our waste, especially waste ........ factories, electric-powered stations, the chemical industry and heavy industry is very dangerous. Fish die ..... the lakes, rivers and seas; forest trees die, too. Much of this dangerous ...... goes into the air and is carried by the ....... for great distances.

The earth is our home. We ....... take care of it, for ourselves, and for our children and grandchildren. This ....... we have to keep our environment ..... and clean . The importance of this task is pointed out by ecologists - the scientists ....... study the relations between living things and the environment. ......, each of us must do everything ...... to keep the land, air and water clean.

Choose a suitable word from the box to put in each blank to finish the passage.

from, means, in, waste, possible, wind, should, green, However, who

Much of our waste, especially waste (1).......... factories, electric-powered stations, the chemical industry and heavy industry, is very dangerous. Fish die (2).......... the lakes, rives and seas; forest trees die, too. Much of this dangerous (3)........... goes into the air and is carried by the (4)......... for great distances.

The Earth is our home. We (5).......... take care of it, for ourselves, and for our children and grandchildren. This (6).......... we have to keep our environment (7).......... and clean. The important of this task is pointed out by ecologists-the scientists (8)........... study the relations between living things and the environment. (9)............, each of us must do everything (10)........... to keep the land, air and water clean.

Choose the best answer.

He forgot to give a ____ before he turned left and got a ticket

A. hand

B. signal

C. sign

D. light

All of us have to obey ____ strictly.

A. traffic

B. traffic rules

C. traffic jam

D. regular

We should wait for the traffic lights _____ before we cross the street

A. turn yellow

B. to turn yellow

C. turn green

D. to turn green

We should ____ the street at the zebra crossing

A. walk

B. walk through

C. walk on

D. walk across

You should ___ right and left when you go across the road

A. see

B. look

C. be

D. take

II. Choose the correct option for each gap in the sentences.

1. Drivers have to ­­­­_ their seatbelt whenever they drive.

A. put B. tie C. fasten D. put on

2. We should wait for the traffic lights _before we cross the street.

A. turn green B. to turn green

C. turn yellow D. to turn yellow

3. All of us have to obey __ strictly.

A. traffic rules B. traffic

C. traffic jam D. regular

4. Cyclists and motorists have to wear a __when they ride a motorbike.

A. hard hat B. cap C. mask D. helmet

5. He for got to give a __ before he turned left and got a ticket.

A. signal B. sign C. light D. hand