题目内容：

On the north coast of Brazil, scientists once found something very strange-lost penguins（企鹅）far from home!The scientists did not know why the penguins were lost. Perhaps a warm current（洋流）took them to the north.But penguins cannot live for long in the warmer waters of the north. It was time to save the penguins.

Sadly though, some penguins were too sick to travel and some of them were dying. The scientists took the healthy birds and put them on a large plane. They flew to the south coast of Brazil. Many people came to watch the birds. But at first, the birds just looked at the water. Then some of the braver ones swam about in it. It was cold!It was good!

And so they began the last part of their journey. People cheered loudly as the younger penguins started swimming behind the older ones. Together, they were on their way home at last.

1.Where were the penguins when the scientists found them?

A. In the water    B. Far from home

C. On a plane    D. On the south coast of Brazil

2.Why were the penguins far away from home?

A. Scientists took them there    B. They swam there

C. Maybe the warm water carried them there    D. They flew there

3.What did the scientists want to do?

A. They wanted to make the penguins swim all the way home

B. They wanted to help the penguins get home

C. They wanted to take the penguins all back to Brazil

D. They wanted to make the penguins go to different places

4.How did the younger penguins get back home at last?

A. They swam behind the older    B. They went by plane

C. They swam in front of the older ones    D. They went by boat