I/ Đọc bài, đièn một từ phù hợp vào chỗ trống: cause ; pulled ; treat ; decay ; sugar; wear ; eat ; teeth ; middle - age ; thought; Many people nowadays have to (1) ___________ false teeth when they are (2) _____________ . The reason is that tooth (3) __________ increases a lot. The amount of (4) ____________ on our food also increases. Doctors and dentists now know that sugar is the chief (5) ______________ of tooth decay. Eskimos’ (6) ___________ , for example, started to decay when they began to (7) ________ sweeter food. Long ago doctors didn’t not like to (8) _________ people’s teeth. Barbers and blacksmiths looked after people’s teeth and (9) __________ them out when they decayed. Some people (10) __________ toothache was apunishment from the Gods. II/ Viết lại những câu sau sao cho nghĩa của câu không thay đổi; (10 đ) 1. What is Mai’s weight? -> How ………………………………….? 2. Why isn’t this TV working now? -> What’s …………………………………..? 3. Trung didn’t go to school last Saturday. -> Trung was ………………………………… 4. Christiano Ronaldo is a very good soccer player. -> Christiano Ronaldo plays ………………………………. 5. My brother runs faster than me -> I ………………………………………….