Is it likely that your siblings （兄弟姐妹） fought like cats and dogs with you when you were younger？ （1）Here's why.
   Siblings can help you have a healthier lifestyle.This is supported by a study that surveyed more than 15，000 people.（2）Brothers and sisters are readily available fitness and healthy-eating friends.That can only be a bonus when you reach adulthood.
   （3）According to a study among 395 families，scientists found that having siblings made you more likely to do good deeds.It could be that having a same- generation relative encourages you to think about others，which can lead to greater life satisfaction，and fewer depressive symptoms.
    Brothers and sisters improve your chances of a happy marriage.Research found that the more siblings you have，the lower your chance of getting divorced （離婚） is.In fact，for each additional one，your risk of marriage breakdown was three per cent less.（4）
   Having good friends can bring many of the same benefits（5）Don't panic.Research also shows that having close friends can boost your health，well-being and longevity （壽命）.Make friends by signing up to groups or classes and finding people who enjoy the same things as you do.

A.That bond is vital as you enter old age.
B.Siblings can protect you from depression.
C.Having siblings makes you do an act of charity.
D.But they can actually boost your physical and mental health.
E.We don't all have siblings，or you might live far away from yours.
F.Having siblings helps deal with the tricky situations in close relationships better.
G.Most of them credited their siblings for having the biggest impact on their health.

【考點】人與自我．

【答案】D；G；C；F；E