塑料材料可以进行哪些表面处理

Do you still get free plastic(塑料) bags from the supermarkets?
Free plastic bags are not allowed at shops and supermarkets in China, and people have to pay for them. The rule started on June 1, 2009. It came because our country tried to make litter less. Making super-thin (超薄) plastic bags has not allowed.
The Chinese once used about 3,000,000,000 plastic shopping bags a day, and they have caused pollution of the environment. The bags have become a main cause of plastic pollution because they are easy to break and people throw them away here and there. So the Chinese people are encouraged to bring their own bags for shopping.
What kind of shopping bag is the best to bring? Some students in Chongqing city have a good idea. They make their own shopping bags. They use old clothes to make cloth bags, and send them to their parents as presents. They also ask their parents and friends to use cloth bags instead of plastic ones. They think it is their duty to protect the environment.
小题1:China made this rule because plastic bags were bad for the _______.

A．environment

B．litter

C．shops

D．supermarkets

小题2:The Chinese people are encouraged to bring _______ for shopping.

A．no bags	B．free plastic bags
C．their own bags	D．super-thin plastic bags

小题3:Some students in Chongqing _______.

A．ask their parents to make cloth bags	B．make cloth bags themselves
C．pick up plastic bags everywhere	D．buy cloth bags for their parents