题目内容：

    Many Beijing residents go to great lengths to avoid breathing the city's smoggy air, especially when it reaches critical pollution levels, but one local entrepreneur decided that canning(灌装) and selling this poor quality air as a souvenir would be a great idea. Believe it or not, he was right.

After seeing a number of companies achieve commercial success by canning fresh air from countries like France, Canada or Australia and selling it in China, Dominic Johnson-Hill, a British-born citizen of Beijing and owner of the Plastered 8 souvenir shop, decided to turn the idea on its head and sell canned Beijing air throughout China and abroad.

"I'd seen people going crazy to buy canned air from Canada and Australia, so I thought it was time to push business the other way," the entrepreneur said. "They' re perfect gifts! What else are you going to take home when you go home from Beijing? A roast duck? A Plastered T-shirt? These cans are light, portable, you can just imagine someone' s face when they unwrap (打开) it for Christmas."

The few mouth-fulls of Beijing air come in standard tin cans featuring a couple of iconic city landmarks as well as a bitter description of the contents: "a unique mix of nitrogen, oxygen and some other stuff". The ironic (讽刺的) souvenirs cost 28 RMB (US $4) and are available at the Plastered 8 shop, as well as on its online shop. But if you're actually considering buying some, you'd better ask shop in advance, as they are virtually flying off the shelves. Johnson-Hill said that his shop is selling hundreds of Beijing air cans every day.

Personally, the well-sold can probably is an awakening for the public to be concerned about the living conditions. Yet one thing that’ s not particularly clear is whether the air is really collected from Beijing, as the cans are labeled as "Made in Shenzhen". There's a big chance that' s just a kind of Plastered 8 humor, as they also list "Choking Hazard" and "May have unidentified objects inside." as warnings.

Anyway, it is probably a unique way to arouse public awareness of protecting the environment.

1.What contributes to Dominic’s idea of canning and selling the poor quality air?

A.Try to get used to it. B.Sell it all over the world.

C.Can it as a souvenir. D.Try to push business the other way.

2.How may one feel when receiving canned Beijing air for Christmas?

A.Satisfied. B.Surprised.

C.Frightened. D.Refreshed.

3.Which of the following can replace the underlined word "stuff" in Paragraph 4？

A.liquids B.objects

C.minerals D.risks

4.What can we infer from the passage?

A.There are unidentified objects in the canned Beijing air.

B.The Plastered 8 souvenir shop is famous for its humour.

C.People should make efforts to protect the environment.

D.Dominic Johnson-Hill likes the poor quality air in Beijing.