Exercise 4: Read the text and choose the correct answers.
My name is Nam. Today is Monday but I can't go to school because I have a headache. The doctor tells me to take medicine and relax. I should relax and shouldn't study very much. It's not good for my health. My friends Hoa can't go to school, either. She has a bad toothache. She must go to the dentist. The dentist advises her not to eat sweets. She shouldn't eat ice cream and drink coke, either. These kinds of food are good for her.
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