1. Air pollution has many effects_________ the environment and living organisms.

A. in                     B. of                     C. for                             D. on

2. The volcano has erupted approximately once every ten years_________ 1970.

A. since                B. in                     C. from                D. for

3. After a severe storm, there is often_________ along the shore that will need to be removed.

A. waste               B. debris               C. lava                 D. junk

4. In the 1980s, acid rain_________ widespread damage to forests in the areas.

A. made of           B. resulted in        C. led for              D. caused by

5. _________  plastic takes so long to break down, it pollutes the land and water.

A. Even though    B. While               C. Since                D. Because of

6. If I had the chance to take part in an International summer camp, I_________ very excited.

A. am                             B. was                  C.      will be         D. would be

7. _________ do earthquakes usually last? - Less than one minute.

A. How strong     B. How long         C.      How often            D. How far

8. Niagara Falls is a great natural_________ on the border of the USA and Canada.

A. castle               B. loch                  C.      spectacle     D. Symbol

9.  The 2010 Haiti earthquake was the most_________ natural disaster in the history of this country.

A. destructive       B. permanent       C. unique             D. awesome

10. “A hurricane is heading toward our home town.” - “_________”

A. That’s a relied. B. How interesting!       C. Glad to hear.   D. Oh my God!