Most American families are smaller than the families in other countries.Most American families have one or two parents and one or two children each.

Children in the US will leave their parents’ home when they grow up.They usually live far from their parents because they want to find good jobs.They often write to their parents or telephone them.And they often go to visit their parents on holiday.

Parents usually let their children choose their own jobs.Americans think it is important for young people to decide on their lives by themselves.

Parents ask children to do some work around their house.And in many families, parents pay their children for doing some housework so that hey learn how to make money for their own use.

1.The size of most American families is ____ that of other countries’.

A. larger than

B. smaller than

C. as big as

D. as small as

2.When children grow up, they leave their parents’ home to __.

A. get married

B. be free

C. find good jobs

D. study

3.They visit their parents ______ .

A. on weekdays

B. on weekends

C. at any time

D. on holiday

4.Which of the following is NOT true ?

A. Children have the freedom to choose their own job.

B. Parents don’t ask their children to do the housework.

C. When children grow up, they usually live far away from their home.

D. Parents think it is important for children to make their own decision.

5.Some parents pay their children for doing housework because _____ .

A. they want their children to learn how to make money for themselves

B. their children asked them to do so

C. they are rich

D. the law requires(要求)them to do so

When US student Olivia Priedeman, 17, woke up one morning, she thought she had had a dream about making plans with a friend.

But it wasn't a dream. Her phone showed that during the night, Priedeman had read a text message from her friend. She did it while she was fast asleep.

Reading and sending text messages while asleep called─ "sleep texting"─ is an unusual sleep behaviour, similar to sleep walking. It's also a growing problem among doctors: young people can’ t live without their cell phones.

One in three teenagers sends more than 100 text messages a day, according to the Pew Internet & American Life Project. And at least four out of five teenagers said they sleep with their phone on or near their bed.

Elizabeth Dowdell, a professor at Villanova University in Pennsylvania, has studied sleep texting. She said that having a phone nearby all night is a big part of the problem.

Andrew Stiehm, a sleep medicine researcher with Allina Health in Minnesota, agrees. It's possible for the part of the brain that controls skills to wake up, while the part of the brain that controls memory and judgment(判断) may be still asleep. That's why some people can perform basic movements-such as walking, talking, texting or even driving while they're sleeping. Some of Dowdell's students said that they're disturbed by their nighttime texting behaviour. But because sleep texting is unconscious, it's a difficult habit to break. Dowdell said she knows of some students who wear socks on their hands to keep themselves from texting.

Marjorie Hogan, a doctor at Hennepin County Medical Centre in Minneapolis, Minnesota, suggests keeping all electronic products outside the bedroom.

1.What happened to Olivia Priedeman?

A. She sleepwalked to a friend's house.

B. She dreamed of making plans with a friend.

C. She phoned one of her friends during the night.

D. She read a text message from her friend while asleep.

2.What does the underlined word "unconscious" mean?

A. 无意义的 B. 无意识的 C. 无反应的 D. 无规律的

3.What can we learn from the passage?

A. It's easy to give up a sleep texting habit.

B. One in three teenagers has a sleep texting habit.

C. Sleep texting can reduce the quality of one's sleep.

D. Sleep texting does more harm to one's health than sleep walking.

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