阅读短文，从各题所给的选项中，选择最佳选项。
Every day, Vicky travelled by bus between her office and home. She noticed something special about the bus driver. Whenever the passengers（乘客）got on the bus, he would smile at them.
However, Vicky also noticed a passenger who ever smiled back at the driver. It seemed that he never had any clean clothes. He often made big noises. Every time he got on the bus, he made the other passengers give up the seat to him in a loud voice. But the driver still smiled at the passenger. Instead, the "noisy" man seemed to never see the smile.
This got Vicky more interested. Once, she asked the driver. "Sir, may l ask you a question? Why don't you throw that noisy man out of the bus?"
The driver looked at Vicky and said, "He's my guest." "He is rude. Don't be so nice to him!" "Let me tell you about my dog." the driver said patiently. "Each time the moon shines, my dog barks at it crazily." Hearing this, Vicky was confused and said, "Sorry, but I don't understand what you're trying to tell me." The driver said, "It keeps barking, but the moon still shines."
1.Vicky thinks the bus driver is special because he __________.
A.drives too fast B.shouts at every passenger
C.works hard very day D.smiles at every passenger
2.What does Vicky think of this "noisy" man?
A.He is clean and friendly. B.He is noisy and friendly.
C.He is not clean and rude. D.He is clean and impolite.
3.Which one is TRUE according to the passage?
A.Vicky went to office by bike. B.The driver is a kind man.
C.Vicky has a dog. D.The "noisy" man always smiled at the driver.
4.The underlined（画线的）word "confused" in the passage means __________.
A.困惑的 B.混乱的 C.尴尬的 D.渐愧的
5.The story mainly wants to tell us that we should __________.
A.smile every day B.not be polite to everyone
C.be strict with ourselves D.always show our kindness to others
A new study says the habit of sleeping in（睡懒觉）on weekends may not be such a good idea for your health.
36 healthy young men and women took part in the study. They were divided into three groups and were followed over 30 days.
The first group could sleep for nine hours each night for the 30 days. The second group had other only five hours of sleep every night. The third group had five hours on weekdays but was allowed to sleep as long as they wanted on the weekend. But on Monday, the third group was put back to the sleep schedule（周期）of only five hours a night.
The study showed that the first and the third groups ate more snacks after dinner and put on weight during the study, men much more than women.
What was surprising the scientists was the third group who slept in on weekends. "Even though people slept as much as they could, it was not enough," Dr. Wright said. "As soon as they went back to the short sleep schedules on Monday, the ability of their body to control blood sugar was badly affected." "Not only that, the result showed increased sensitivity to insulin（胰岛素）in both their muscles（肌肉）and their livers（肝脏）, the result wasn't found in other groups. The reason may be that their body clock had been changed.
1.How many groups were the people divided into in the study?
A.3 B.4 C.5 D.6
2.How long did the third group sleep everyday？
A.5 hours everyday.
B.9 hours everyday.
C.9 hours on weekdays and 5 hours on weekends.
D.5 hours on weekdays and sleep as long as they wanted on weekends.
3.From the study we know that __________.
A.women put on more weight than men
B.the sleep-deprived（睡眠不足的）people were more healthy
C.the second group didn't put on weight
D.women ate more snacks after dinner
4.What happened to the members in the third group?
A.Their blood sugar was badly affected.
B.They had enough sleep.
C.They didn't change their body clock.
D.They had increased sensitivity to insulin in hand.
5.What does the passage mainly tell us?
A.Sleeping is not important.
B.Sleeping too much on weekends may not be good for our health.
C.We can change our body clock as often as we can.
D.Adults don't need too much sleep.
