2 . listen and jill in the blank with one word you hear:

1. Solar energy can be cheap, clean and ...................................

2. Solar energy doesn't cause ...................................

3. A lot of ................................... in the world are already using solar energy .

4. It is possible to ................................... solar energy for a number of days.

1.Complete these sentences (1,0pt)

1 . Solar panels / install / the roof / the house / the future .

.............................................................................................

2 . the future / many people / use / flying cars / avoid / traffic jam.

.............................................................................................

3 . What about / use / low / energy light bulbs / the classrooms?

.............................................................................................

4 . Hoa / used / fly / kite / when / she / be / young girl.

.............................................................................................

thêm từ 

1     since then / population / ho chi minh / city / grown / grown

2     It / population / explosion

thêm từ

1    Ho Chi Minh/one/the largest cities/Viet Nam  .

2     According to the figures from the population in vestigation committe population / Ho Chi Minh City / 1979 / there million people

3     But / 2009 / its population / 7 million people

4     It / much big / than / that / 1979