题目内容：

    The new garbage sorting regulation(规定) has taken effect in Shanghai July 1. Many citizens are still confused about the four different types of garbage. Thankfully, the government has released(发布) an official guideline to make the new rules clear.

The guideline, published by Shanghai provides a rather clear definition（定义） on the four kinds of waste: recyclable waste, hazardous (有害的）waste，household food waste and residual (剩余的）waste.

Specific as the new guideline is, residents still have a hard time sorting trash correctly and are finding it challenging to memorize them all. "We should do this from a pig’s angle, "commented one netizen, "Those that can be eaten by pigs are household food waste. Those even pigs don't want to eat are residual waste. If a pig consumes something and dies of it,then something must be hazardous waste. Those that can be sold to gain some money used to purchase pigs are recyclable waste."

Garbage sorting is not only beneficial to the environment and a way of handling global warming, but is also good for business and industry.It saves energy. That's because it's cheaper to recover raw materials(原材料) from recycled waste than go through the former producing processes(过程).

One resident in Switzerland once said, "If you get used to it,it becomes normal. Now I don’t think much about it. It's become an instinct. " At present, those who do not sort their trash properly will be fined RMB200, but we hope one day the environmental protection will also become our instinct soon.

1.What do the old books you want to throw away belong to?

A.Residual waste. B.Hazardous waste.

C.Recyclable waste. D.Household food waste.

2.Which of the following best explains "instinct" underlined in the last paragraph?

A.instruction. B.habit.

C.motivation. D.challenge.

3.Why is garbage sorting beneficial to business and industry?

A.It can deal with global warming.

B.It can make more raw materials.

C.It can lower the cost by simplifying the process.

D.It can make the former producing processes easier.

4.What’s the best title for the text?

A.Shanghai Garbage Sorting Regulation Begins.

B.People Are Still Confused About Garbage Sorting.

C.Four Sorts of Garbage Are Forbidden in Shanghai.

D.Shanghai Citizens Support the Garbage Sorting Policy.