27.When a stroke occurs,the arteries leading to and within the brain.
28.A person’s vision is likely to be affected if a stroke.
29.Some people can reduce their risk of stroke if they.
30.New treatments are now available to people who.
A suffer from a stroke
B will be affected
C change their lifestyles
D will take place
E occurs at the back of his/her brain
F controls various body functions