II. Use the correct form of the words:

1/ The ( science ).................................................................................can know when a volcano will erupt.

2/ The village was ( complete )....................................................destroyed by the typhoon last week.

3/ Many people become ( home )...........homeless..................because of the ( nature ).........natural................disasters every year.

4/ ( Tidal ) ...............................waves are the result of an abrupt shift in the underwater movement of the earth.

5/ He was very tired, so he walked ( slow ).............slowly...........................................................................................

6/ If we go on littering, our environment ( become )...............................................................seriously polluted.

7/ Tet is the most ( importance ).........................................................................festival  for Vietnamese people.

8/  Do you know the reason for ( celebrate ).................................................................................Mother’s day?

9/ We are very ( pride )............................................................................................................of our fatherland.

10/ They take part in many ( culture )..................................activities in their town.

11/ Easter is a ( joy )..............................festival which is ( celebrate ).....................................in many nations.

12/ Everybody cleans and ( decoration )...............................................................................the houses for Tet.

13/ She is always ( worry )............................................about her children because she lives far from them.

14/ He is an ( active )............................in the town charity program. He is very ( active )................................

15/ Pompeii was completely destroyed in AD. 79 by an ( erupt ).......................................of Mount Vesuvius.

16/ We can reduce garbage by ( recycle ).......................................................................................waste things.

17/ He ( learn ).....................................English since he was ten years old.

18/ My teacher suggests ( put )....................................garbage bins around the schoolyard.

19/ If you can’t find your place, he ( help )..................................you to get there with this map.

20/ What might happen if the ( pollute )..................................................................goes on?.

They live ( happy ).........................................................................................although they are very rich.