1．How many times did you brush your teeth yesterday?

　　·Finding：A full 33% of seniors brush their teeth only once a day.

　　·Step：Remove the 300 types of bacteria in your mouth each morning with a battery­operated toothbrush.Brush gently for 2 minutes, at least twice a day.

　　2．How many times did you wash your hands or bathe yesterday?

　　·Finding：Seniors, on average, bathe fewer than 3 days a week.And nearly 30% wash their hands only 4 times a day — half of the number doctors recommend.

　　·Step：We touch our faces around 3,000 times a day — often inviting germs (病菌) to enter our mouth, nose, and eyes.Use toilet paper to avoid touching the door handle.And, most important, wash your hands often with hot running water and soap for 20 seconds.

　　…

　　57．Doctors suggest that people should wash their hands ________.

　　A．twice a day　B．three times a day

　　C．four times a day　D．eight times

　　a day ,

　　由2中的Finding中的关键词“half”可以推知，医生建议的次数是每天8次。故选D项。

　　方法二、利用文中“关键句”进行推理判断

　　[典例](2017·湖南高考阅读理解A节选)LOOK AFTER YOURSELF Really central hotels in cities such as London, Edinburgh and Cardiff can cost a fortune, especially at weekends and during big events.As an alternative consider checking into a self­catering flat with its own kitchen.Often these flats are hidden away on the top floors of city centre buildings.A great example is the historic O'Neill Flat on Edinburgh's Royal Mile, available for ￡420 for five days in late September, with room for four adults.

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