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).............................because of the (nature).........................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)........................................................................................................
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.