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 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 via a Bluetooth wireless 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.

The toothbrush will also be able to talk to other applications on your phone, so developers could, for instance, create a game controlled by your toothbrush. You could score points for beating monsters among your teeth.“We try to make it smart but also fun,” Serval says.

Serval says he was inspired 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, for $99 to $199,depending on features. The U.S.is the first target market.

Serval says that one day, it’ll be possible to replace the brush on the handle with a brushing unit that also has a camera. The camera can even examine holes in your teeth while you brush.

1.Which is one of the features of the Kolibree toothbrush?

A. It can sense how users brush their teeth.

B. It can track users’ school performance.

C. It can detect 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.Which of the following might make the Kolibree toothbrush fun?

A. It can be used to update mobile phones.

B. It can be used to play mobile phone games.

C. It can send messages to other users.

D. It can talk to its developers.

4.What is Paragraph 5 mainly about?

A. How Serval found out his kids lied to him.

B. Why Serval thought brushing teeth was necessary.

C. How Serval taught his kids to brush their teeth.

D. What inspired Serval to invent the toothbrush.

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1.The main idea of this passage is_________.

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B. Thousands of people the world over are killed each year.

C. The laws of some countries about driving are not too strict.

D. Only stricter traffic laws can prevent accidents.

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Singles’ Day falls on November 11th every year in China . 1. is recognized as a day for people who have no girlfriend or boyfriend. Couples and lovers have Valentine’s Day in 2. (celebrate) of their love, but how about the singles? There must be a day they can celebrate even without a partner. That’s 3. people created Singles’ Day.

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Dolphins are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this way they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brains are nearly the same size as our own, and they live a long time—at least twenty or thirty years.

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Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them.

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