Bài 1 :

1. as

2.occurs

3.wasteful

4.loss

Bài 2 :

Question 5 :  Electricity can be produced from any sources of enery.

Question 6 : Yes, it'd like to.

Question 7 :  Because the enery from the sun, the waves and the winds last forever.

I

1.as ( be not+ as + adj +as ) 

2.occurs 

3.wasteful (it's very + adj + to V)

4.loss ( loss of sth : mất đi thứ gì )

II.

5. electricity can be produced from any sources of energy

6.yes ,it would

7.Many countries are spending much more time and money on research because the energy from the sun, the waves and the winds last forever.