句子改错（共8小题；每小题1分，满分8分）

小题1:You are terrible ill . You’d better stay in bed .  ________

小题2:The twins didn’t feel well , but they didn’t come . ________

小题3:There is going to have a dolphin show in the zoo .  ________

小题4:Yesterday was her birthday. She bought himself a nice diamond necklace.

小题5:Though he is a five-year-old boy, but he can play computer very well .____________

小题6:It’s hard for him to do so many homework in one day . __________

小题7:Computer is one of the greatest invention. I can’t imagine life without it          

小题8:I think doing some exercise can make you feel relaxing after a day’s work. 

在心动周期中，心室内压力上升最快的是在（）。

A．快速射血期

B．快速充盈期

C．减慢射血期

D．等容舒张期

E．等容收缩期