18．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（跟蹤） 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 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 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，from 99to199，and the U．S．is the first target market．
29．All of the following statements are wrong exceptB．
A．It can track users'school performance．
B．It can sense how users brush their teeth．
C．It can check users'fear of seeing a dentist．
D．It can help users find their phones．
30．What can we learn from Serval's words in Paragraph 3？D
A．You will find it enjoyable to see a dentist．
B．You should see your dentist on a day-to-day basis．
C．You'd like a dentist to watch you brush your teeth every day．
D．You can brush with the Kolibree as if guided by a dentist．
31．What can we infer about Serval's children？A
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．

分析 這是一篇關(guān)于科技發(fā)明的文章．本文介紹了一種新型的電動(dòng)牙刷既智能又有趣，能夠檢查人們的刷牙情況．

解答 BDA
29．B 考查細(xì)節(jié)理解．由第一段第四句"An electric toothbrush senses how long…"可知，這種電動(dòng)牙刷可以感知你刷牙的時(shí)間和刷牙的情況，這些你都可以通過(guò)手機(jī)來(lái)知道自己的表現(xiàn)．故答案選B．
30．D 考查細(xì)節(jié)理解．Serval這句話的意思是用這種電動(dòng)牙刷就好像有牙醫(yī)天天在監(jiān)督你的刷牙情況一樣，故答案選D．
31．A 考查判斷推理．根據(jù)第五段第二句"He would come back…They said‘yes，'but …"可以推斷，Serval的孩子沒(méi)有刷牙卻說(shuō)自己刷牙了，這說(shuō)明孩子們不喜歡刷牙．故答案選A．

點(diǎn)評(píng) 本文是一篇日常生活類閱讀，題目涉及多道細(xì)節(jié)理解題，推理判斷題．做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文，把握文章主要內(nèi)容，聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義，從中選出正確答案，一定要做到有理有據(jù)，切忌胡亂猜測(cè)．

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