Bài 12. Chọn và điền từ thích hợp để hoàn thành câu dưới đây Must ; don't have to ; might ; should ; mustn't ; shouldn't 1. You ______ drive on the paverment. It's illegal. 2. You_______say that. It's not nice . 3. I _______go to work tomorrow because it's a public holiday. 4. I _______ buy this CD , I'm not sure. 5. You_______eat more vegetables. They're good for you. 6. You_______be 18 before you can buy alcohol.

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