题目内容：

    Tired of seeing so much garbage along the bank of River Schie in Rotterdam Dutch artist Tommy Kleyn decided to step up and do something about it. He alone organized a cleanup of the entire bank without leaving any garbage, proving that anyone can indeed make a difference if they want to.

Kleyn would cycle past a part of the Rotterdam riverway and see so much garbage along the bank. The situation troubled him, so he decided to spend 30 minutes every day cleaning the place up, filling one garbage bag a time. And when he posted pictures of his work on Facebook, a few of his friends volunteered to join as well. In five weeks, they had a 100 meter riverbank clean and completely rubbish-free.

Kleyn's action has received great support online, and he has managed to turn it into a small movement. He has set up a Facebook page through which he challenges people to spend 30 minutes a year to fill a garbage bag with rubbish. “It feels great and you'll make a big difference," he wrote. “People are free to share their 'before' and 'after' pictures on the page. The challenge has attracted people in countries・ The people came from as far as China to respond with their own photos and stories!"

“I want to show how easy it is to remove rubbish," he added. “Hopefully there will come a time when makers are thoughtful and their goods are no longer wrapped in layers of plastic."

Local officials praised Kleyn's work on the riverbank and helped him raise money for future projects as well. “People can sign up to help me one day a year. For this, they received a coupon, like going to a local restaurant at the lowest price. You can imagine what I've man- aged to do in 22 days, and what 22 men could do in a day. he said.

1.What happened after Kleyn posted pictures of his work on Facebook?

A.Some of his friends were forced to join him.

B.The whole riverbank was completely rubbish-free.

C.His Pictures received little attention from foreigners.

D.His work on the bank of River Schie started to pay off.

2.What do we know about Kleyn's action?

A.It has influenced many people.

B.It is opposed by local officials.

C.It is difficult for Chinese to accept.

D.It has made people stop using layers of plastic.

3.What does the underlined word "coupon” in the last paragraph refer to?

A.A job lasting 22 days.

B.A kind of plastic garbage.

C.A piece of printed discount paper.

D.A fund for supporting future projects.

4.What is the main idea of the text?

A.River pollution in Dutch has been solved by Tommy Kleyn.

B.A Dutch eco-hero proves that one man can make a difference・

C.Environmental protection needs support from the government・

D.Facebook plays an important role in environmental protection.