英語作文給朋友寫壹封email勸他多交朋友，多參加社會活動。

Dear John,

Hello.Thanks for your e-mail.Now I would like to give you some advice.First of all,you're supposed to make more friends.As we all know,friends are very important to us,they can give us a hand when we're in trouble.Second,you should participate in all kinds of social activities,such as going to parties and dancing balls.That will widen your horizons and improve your communicating skill.

Good luck to you