1.He got so carried away laughing that he fell off his chair!
2.This hat that is being auctioned of on E-bay was worn by a famous celebrity.
3.My sister is constantly complaining about everything,and i am constantly ignoring her.(=P)
4.Alex is not only smart but also polite ;but his brother is not only lazy but also rude
5.Its solution lies in (要看你在讲什么问题)