Cats are animals of habit． They like to go to sleep about the same time every day and for a certain length of time． They seem to have a natural clock inside them that tells them when to sleep．

　　Besides their regular (定时的, 正式的) sleep, cats． take naps (打盹)． Some scientists think that people should also take cat naps． The habit would do good to people's health． Cat-naps help build up energy (精力, 能量) in the body． Since cats have moods (情绪) like those of people, scientists believe that people can improve their moods and attitudes by catnapping． People might become happier and more active．

　　A lot of famous people take cat naps during the day． The naps would usually last 15 to 30 minutes． Winston Churchill took cat naps． So did a few presidents of the United States． These people were known for their energy． They were able to work long hours into the night． Napping was their secret．

　　Perhaps more people could learn from cats and take naps to feel better and live longer!

1．Cats ______

A．are asleep all day．

B．are awake all day．

C．have a regular time to sleep．

D．go to sleep when a clock strikes．

2．Some scientists believe that catnapping is _______

A． a bad habit． B． a healthy habit． C． a lazy habit． D． not necessary．

3．According to the text, cat naps could make people ______

A． happy and active　　 B． sleepy．

C． unhappy． D． tired and lazy．

4．Cat naps usually last _____

A． no more than half an hour．B． several hours．

C． just a few minutes．　　 D． quite a long time,

5．Many famous people were able to work long hours because

A．they took cat naps．　　B． they lived longer．

C．they had a secret．　　 D． they had many things to do．

为丰富知识、了解世界，上海某学校学生会将于周日组织部分学生去参观世博。请按以下提示写一份100字左右的通知。

　 出发时间为本周日上午7:00，请同学们穿好校服在校门口集合；

　 排队等候时，同学们一定要遵守规则，不要插队，最好带上遮阳伞和折叠椅（folding chair）；

　 为保护世博园的环境，请同学们自带垃圾袋，切勿随地乱扔垃圾；

　 下午5:30准时在6号门集合返校。

Notice

Boys and girls,

　 Good news! We are going to visit EXPO this Sunday．____________________________

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　 Hope we have great fun!

Students’ Union