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    Teeth are important. Strong, healthy teeth help you chew all kinds of foods that help you grow. They help you speak clearly. And yes, they help you look your best. Here are some tips for you to take care of your teeth.

    1.How many times at least should we brush our teeth a day?

            A. 1.           B. 2.         C. 3.         D. 4.

    2.What is the major cause of tooth decay?

            A. Not brushing teeth.         B. Not changing toothbrushes.

            C. Eating sugar.              D. Not flossing teeth.

    3.How often should we change our toothbrushes?

    A. Never.                  B. Three times a month.  

    C. Every three months.       D. Every month.

    4.The bristles of the toothbrush must be_______.

             A. hard         B. soft.       C. expensive.      D. not mentioned.

    5.Which is the right way to take care of your teeth?

    A. Only brush front teeth.      

    B. Don’t brush teeth before sleeping.

    C. Spend at most three minutes brushing teeth each time.

    D. Eat lots of fruit and vegetables and drink water instead of soda.

     

    【答案】

     

    1.B

    2.C

    3.C

    4.B

    5.D

    【解析】略

     

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