withthatlittlestartdobecausewayhowmakeexplainbadSometimesweseesomepeoplereadingbookswhilebitingtheirnails(咬指甲).AccordingtotheBBC.upto45percentofteenagersbitetheirnails

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   Sometimes we see some people reading books while biting their nails (咬指甲). According to the BBC. up to 45 percent of teenagers bite their nails. There is not an exact answer to 61        why people bite their nails. But most com?monly nail biting is said to be a nervous habit. It is done 62        of stress (压力) ，boredom or excitement.

   What’s more a report says that people with higher levels of intelligence 63          iting their nails at an early age. It believes that compared 64        common people 65        with higher levels of intelligence may feel higher levels of stress more easily.

   This habit is 66        for the biters. It can give them red or sore fingertips. And longterm nail biting can affect (影响) 67        nails grow.

   But don't worry!There are many 68        to stop biting your nails. First keep your nails clean. The more you focus on taking care of your nails the 69        likely you may bite them again. Also when you feel stressed try to relax. 70        exercise or having a warm bath can help.

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Answer 1