1/Because every years about fifty million people have go to the doctor because of heachache.

2/People can see black dots or bright plots.

3/Yes, they can.

4/When they work too hard or they too nervous about something.

5/They can prevent by changing their diets or their lifestyle.

*Nếu bạn thấy hay thì hãy vote mk 5 sao và ctlhn để mk có động lực nhé*

Chúc bạn học tốt

1 Because about fifty milion people have to go to the doctor because of headache

2 No, they can

3 Yes,they can

4 People have headaches when they work too hard or they are too nervous about something

5 They can prevent by changing their diets or their lifestyle.