题目内容：

An artist in Bogota, Colombia is using his skills to aid the homeless. Greg Kloehn builds very small shelters that make life on the streets a little more comfortable. The structures offer the homeless some safety and protection from bad weather. Each little house also has wheels on the bottom so it can go wherever its owner goes.

Greg Kloehn has given away at least 20 tiny houses. Several are on the roadside near an active railroad. On a recent day, Mr. Kloehn stops at one to visit Oscar Young. The two men hug. Inside his little shelter Mr. Young gets relief from cold nights on the streets. Mr. Kloehn also visits Sweet-Pea, another friend who also lives in one of the little homes the artist built. She says it keeps her safe and protects her belongings.

In the mornings, Mr. Kloehn searches the streets for building materials. He gathers what he can and takes it to his studio. There, he puts the houses together. Empty coffee bags become roof material. A washing machine door and refrigerator part become windows. Nails, screws and the sticky glue hold all the pieces together. The artist also attaches a small electrical device to the house. The device is powered by the sun.

Some of the people living on the streets once had normal houses of their own. But some of the people say they have learned to live with the homeless and they are thankful to that man.

Mr. Kloehn says his work is not a social project. He says he is just someone applying his skills to helping his homeless neighbors.

1.The following are the advantages of the small shelters except ________.

A. saving power and energy

B. protecting possessions of the homeless

C. decorating the streets where they are

D. keeping the homeless safe and comfortable

2.We can learn from the passage that ________.

A. Greg Kloehn has sold at least 20 tiny houses

B. an act of kindness has made people simple and grateful

C. The shelters are immovable

D. The government has got involved in the action

3.The passage is likely taken from ________.

A. an official report    B. an art review

C. a fictional brochure    D. a news report

4.What’s the main idea of the passage?

A. An artist creates homes for the homeless.

B. A more comfortable shelter on the streets.

C. A successful social project in Bogota.

D. An artist makes a living by designing small shelters.