二、阅读短文，选出与短文内容相符的最佳选项。
A penguin not only wears a white shirt and a black jacket, but also has a smart yellow tie! Maybe because of this, there are many stories about penguins. However, many of these stories are not right. For example, some penguins in the stories live in the Arctic Circle（北极圈）. In real life, there are no wild penguins in the northern hemisphere（北半球）.
There are about twenty different kinds of penguins in the world. Penguins usually live not only on land, but on snow and ice as well. In fact, many penguins spend most of their lives staying in the sea. And most penguins like to live in open water with no ice.
Do penguins sing songs? It is known that there are three kinds of penguin songs. They talk with each other by singing songs. But most of them don't talk all the time because talking cuts down energy. So we often see penguins in small groups walking freely, or quietly resting on the beach in the sun.
（）1. This passage mainly talks about .
A. three kinds of penguin songs
B. penguins
C. different kinds of penguins
D. where penguins live
（）2. How many kinds of penguins are there in the world according to the passage?
A. About 20.
B. 30.
C. 40.
D. About 10.
（）3. Wild penguins don't live .
A. in the Arctic Circle
B. on land
C. in the sea
D. on snow and ice
（）4. How do penguins talk to each other?
A. By crying loud.
B. By singing songs.
C. By dancing.
D. By smiling.
（）5. Why don't penguins talk all the time?
A. Because they feel cold.
B. Because they like sleeping.
C. Because they like to be quiet.
D. Because talking cuts down energy.

1.B 2.A 3.A 4.B 5.D

1. 主旨大意题，短文围绕企鹅的相关知识展开，A、C、D均为文中的部分细节，B符合主旨，故选B。2. 细节理解题，根据原文第二段第一句“There are about twenty different kinds of penguins in the world.”可知选A。3. 细节理解题，根据原文第一段最后“there are no wild penguins in the northern hemisphere（北半球）”，北极圈属于北半球，故选A。4. 细节理解题，根据原文第三段“They talk with each other by singing songs.”可知选B。5. 细节理解题，根据原文第三段“But most of them don't talk all the time because talking cuts down energy.”可知选D。