Question

Answer 1

1.Beacause every year about fifty million people have to go to the docyor because of headache
2.People can see black dots or bright spots in front of their eyes
4.People have headache when they work too hard or they are too nevous about something

Answer 2

1 Because every year, about fifty million people have to go to the doctor because of headache.

2 They can see black dots or bright spots in front of their eyes.

3 Yes, they can

4 They have headache when they work too hard or they are too nervous about something

5 They can prevent headaches by changing their diets or their lifestyle or simply by going to bed