I.MISTAKES:(10 MISTAKES) (phải giải thích vì sao từ đó lại sai)
Headache is a very common disease in the USA. Every year, about fifty millions people have to go to the doctor because headache. The symptoms of a headache is various. People can see black dots or bright spots in front of their eye. They may also have painful only on one side of the head. Sometimes when the pain go away, the head is sore. People have headache when they work too hardly or they are too nervously about something. Medicine can help cure the disease but people usually has to do more than taking tablets. They can prevent headaches by changing their diets or their lifestyle or simply by go to bed.
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