Bài 1 Chiếu một tia sáng tới gương phẳng thứ nhất và đặt thêm một gương phẳng thứ 2 hợp với gương thứ nhất 1 góc nhọn B để hứng tia phản xạ từ gương thứ nhất . Khi tia tới ban đầu quay một góc t sẽ làm tia phản xạ trên gương thứ hai sẽ quay một góc bằng bao nhiêu ?

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V. Give advice to the following people. Use I think……should or I don’t think..…should and one of these phrases. Go to the dentist Take them back to the shop Tell your bank Wait Go to work Tell them to buy fruit Drive Be more careful Write to people Work so hard 1. Jenny and Tony are only sixteen, but they say they want to get married. I think they should wait. 2. Kate is crying because I knocked her over. We were playing a game. …………………………………………………………………………………………... 3. Peter’s got a very bad cold. …………………………………………………………………………………………... 4. Ann’s phone bill was enormous! Three hundred pounds! …………………………………………………………………………………………... 5. Keith wants to drive home, but he hasn’t got his glasses. …………………………………………………………………………………………... 6. One of my teeth is loose. …………………………………………………………………………………………... 7. I’ve lost my cheque book and credit cards. …………………………………………………………………………………………... 8. My shoes have got a hole in them. I only bought them last week! …………………………………………………………………………………………... 9. My children spend all their pocket money on sweets. …………………………………………………………………………………………... 10. I’m always tired because I’ve been working very hard. …………………………………………………………………………………………...