Look at the paper in the picture carefully. Is there anything different from your notebook paper? This kind of paper feels as soft as your notebook paper. It’s also easy to write on. But do you know, this kind of paper is made from stone?
As we know, stone is easy to get on the earth, so it’s cheap. And the stone paper is about 20% to 30% cheaper than ordinary paper. The stone paper causes little pollution and helps protect the environment, because it makes tree and water free. The following table shows what is needed to make one ton of stone paper and one ton of ordinary paper. 

Ingredients (成份) One ton of	Trees	Water	Bleach (漂白剂)	Stone	Additives (添加剂)
Stone paper	No	No	No	0.8 ton	0.2 ton
Ordinary paper	5 tons	72 M^3	Yes	0.2-0.3 ton	0

 
Now in Beijing, some students begin to use stone paper to do their homework. And during the two sessions (两会) in 2011, stone paper was also used.
Stone paper is ______________.

A．cheap

B．difficult to write on

C．not soft

D．bad

We need  _______________ ton of stone to make one ton of stone paper..

A．0.8

B．0.3

C． 0.2

D．0.25

________________in Beijing begin to use stone paper to do their homework.

A．All the students

B．Some students

C．Many students

D．Nobody