3. I look at Cuba, ninety miles _______ the coast of the United States.

2. Vancouver is surrounded ___ mountains ____ the north and east and the Pacific Ocean ___ the west. ___ the coast north of it still remain some of the oldest and most beautiful forests in the world.

1. They went ___ a trip ___ Canada to visit their cousins ___ the Atlantic coast.

18. They are putting too much carbon dioxide ___ the atmosphere.

M3u5

17. Others, called amphibians, were able to live on land ___ well as in the sea.

16. Whether life will continue on the earth for millions of years to come will depend ___ whether this problem can be solved.

15. Nobody knew that is was going to be different ____ other plants going ____ the sun.

14. A quarrel broke ____ suddenly at night.

13. The crowd cheered ___ when they saw the teams arrive .

12. Nothing can prevent their plan___ being carried out.