C.
1. B
2. A
3. D
4. A
II/
1. Yes, it can.
2. If we didn't waste so much energy, our resources would last longer.
3. Many countries are spending much more time and money on research because the energy from the sun, the waves and the winds last forever.
4. We really won't survive unless we start working on cleaner and safer sources of energy.
D.
I/
1. Less electricity will be used in the future.
2. This computer is mine.
3. Flying cars will be shown to the public when they finish it.
4, Tam used to type fast.
II/
1. They will be learning EL this time tomorrrow.
2. Solar energy will be used by many countries in the world.
3. How will people fly from one contiment to another?
4. Turn off the lights before leaving the room to save energy.
Bn học tốt!!
