C. 1. mordern sources of energy

  2. Plant waste and animal manure

  3. Yes, it is

  4. The wind and the sun

  5. Renewable source

D.I. 1. Less electricity will be used in the future.

  2. Public transport will be used by the students in my school when travelling long distances.

  3. The light will be turn off when ...

  4. A great deal of energy will be offered by wind power next century.

  5. Sources of energy will be used more effectively for our future.

   6. The use of biogas for cooking will be increased by people in the country side

II(bài dài quá, mình đánh số nhé :( 

  1. this time tomorrow/English/they/will be learning.

                    4                   3         1             2

   2.          1/4/3/2

   3.           5/1/3/2/4

   4.          4/2/5/3/1