How fit are your teeth? Are you lazy about brushing them? Never fear. An inventor is on the case. An electric toothbrush senses how long and how well you brush, and it lets you track(跟踪) your performance on your phone.

The Kolibree toothbrush was exhibited at the International Consumer Electronics Show in Las Vegas this week. It senses how it is moved and can send the information to an Android phone or iPhone through a Bluetooth wireless(无线的) connection.

The toothbrush will be able to teach you to brush right(don't forget the insides of the teeth!) and make sure you're brushing long enough. "It's kind of like having a dentist actually watch your brushing on a day-to-day basis," says Thomas Serval, the French inventor(发明家).

The toothbrush will also be able to talk to other applications(设备) on your phone, so developers could, for example, create a game controlled by your toothbrush. You could score points for beating monsters among your teeth. "We try to make it smart and fun," Serval says.

Serval says he got the idea by his experience as a father. He would come home from work and ask his kids if they had brushed their teeth. They said "yes," but Serval would find their toothbrush heads dry. He decided he needed a brush that really told him how well his children brushed.

The company says the Kolibree will go on sale this summer, from $99 to $199, and the U.S. is the first target market.

1.All the following statements are wrong EXCEPT_________.

A. It can sense how users brush their teeth. B. It can track users' school performance.

C. It can check users' fear of seeing a dentist. D. It can help users find their phones.

2.What can we learn from Serval's words in Paragraph 3?

A. You will find it enjoyable to see a dentist.

B. You should see your dentist on a day-to-day basis.

C. You can brush with the Kolibree as if guided by a dentist.

D. You'd like a dentist to watch you brush your teeth every day.

3.What can we infer(推断)about Serval's children?

A. They were unwilling to brush their teeth.

B. They often failed to clean their toothbrushes.

C. They preferred to use a toothbrush with a dry head.

D. They liked brushing their teeth after Serval came home.

Americans are very direct people. When they want something they say “yes” and when they don’t they say “no”. If they want something different from what is given, they ask for it. Here’s an example. I arrive at someone’s house and he gives me wine, I don’t want wine. Maybe I don’t like it or maybe I just don’t want it. I will say “No, thanks.” If everyone around me is drinking something, I would ask for something else, “No, thanks. But I’ll take a bit of tea if you have some.” If I really want wine, I just say, “Yes, thank you.” Unless they happen to know the Chinese customs, westerners will not ask you again and again after you have said you don’t want it.

1.If Americans want something, they would say “_______”.

A. Yes, thank you., B. No, thanks., C. No, I’m sorry., D. Yes, why not ?

2.When Americans do not want what is given, they would say “_______”.

A. No, I don’t., B. No, thanks., C. Yes, thank you., D. No, I’m sorry.

3.In this passage, “westerners” means_______ .

A. the people who live in the west of their country

B. the visitors who go to the Western countries

C. the people who live in the Western countries

D. the people who know the customs of the West

4.The Chinese people might if you don’t want something given.

A. be glad, B. say “thank you”

C. get angry, D. ask you again to take it

5.From this passage we know that__.

A. the Chinese people are direct, B. the Chinese customs are better

C. the westerners are more polite, D. different countries have different customs

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