句子改错（共8小题；每小题1分，满分8分）
You are terrible ill . You’d better stay in bed .  ________
The twins didn’t feel well , but they didn’t come . ________
There is going to have a dolphin show in the zoo .  ________
Yesterday was her birthday. She bought himself a nice diamond necklace.
Though he is a five-year-old boy, but he can play computer very well .____________
It’s hard for him to do so many homework in one day . __________
Computer is one of the greatest invention. I can’t imagine life without it          
I think doing some exercise can make you feel relaxing after a day’s work.