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.

　　文章大意：本文主要讲述了一种新式牙刷及其多种功能。

　　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.

　　答案：A　细节理解题。由第一段的第四句话可知，牙刷检测刷牙的时间和好坏。故选A项。

　　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 day­to­day 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.

　　答案：C　推理判断题。根据第三段的It's kind of like having a dentist actually watch your brushing on a day­to­day basis可知答案。

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