Ex 1. 1. Do/ morning exercise/ regularly/ good/ your body. …………………………………………………………. 2. You’d better/ stop/ smoke/because/it/not/good/your health. …………………………………………………………………. You’d better stop smoking...

Here are the corrected sentences: Ex 1: 1. Doing morning exercise regularly is good for your body. 2. You'd better stop smoking because it is not good for your health. (no correction needed) 3. My brother works as an architect at a design company he joined last year. 4. The girl decided to learn how to use a sewing machine in her free time. 5. Now, my mother is going to the supermarket to buy some food for dinner. 6. Huy's uncle did not recognize him because he looked different from his father. 7. Many children enjoy playing water sports, but their parents do not allow them to play. 8. You should give up smoking because it is not good for your health. 9. He does not usually go on a picnic on weekends, but he stays home instead. 10. It took me two hours to do my homework without using the dictionary. Ex 2: 1. Last week, Dr. Nguyen advised me not to stay up too late because I might have a headache. 2. Watching TV is one of the most common activities that young people do to relax after a busy day. 3. Huy is busy with his work, but he always spends time reading books. 4. I do not often go fishing in winter because the weather is very cold. 5. Ling may have a fever after walking in the rain with her friends. 6. It is not easy for David to take care of his daughter when his wife is not at home. 7. My uncle is interested in playing sports because it helps him lose weight. 8. Although Minh loves cartoons so much, he does not have time to watch them every day. 9. Wearing uniforms encourages students to be proud of their school. 10. Sally was shocked when her brother got into an accident on the street last week. Ex 3: 1. Mile was absent from school yesterday because he missed the bus. 2. My father will spend the next holiday visiting many places in Thailand. 3. Although these dogs are lovely, my children are afraid of them. 4. Do not forget to brush your teeth before you go to bed. 5. My mother does not want me to play computer games because it is not good for my eyes. 6. It is necessary for children to wash their hands before having a meal. 7. It took me thirty minutes to write my essay after reading that book. 8. What kind of TV programme did Mai like watching the most when she was small? 9. Hung tried his best to get the highest score in the competition because he wanted his parents to be happy. 10. It is not difficult for him to live alone in this city for many years. Ex 4: 1. Quyen spent her last vacation traveling around the world with her family. 2. Most of my friends are interested in playing sports, so they joined the Sports Club. 3. She takes care of these dogs every day, so she is not afraid of them. 4. You should be careful with this stove because it is very hot. 5. They spend a lot of time going on picnics together during summer vacation. 6. Tom always tries his best to become one of the most excellent students in his class. 7. Huy is busy with his work, but he always spends time reading books every day. 8. Sam wants to buy a loaf of bread, so she decided to go to the bakery. 9. What kind of transportation will Tom choose when he travels to Nha Trang on vacation next summer? 10. Doing exercise and eating healthy food are good ideas if you want to lose weight. 1. She would like to spend a day staying at home before moving into a new house. 2. Paul hates living alone, so he decides to go out for a walk with his friends. 3. Many people are interested in living in the countryside when they were small. 4. Luna is good at drawing but she doesn't want to be an artist in the future. 5. After failing the test last week, Kim promised not to play computer games in the evening. 6. Their apartment has two rooms and it's on the eighth floor of the building. 7. Most people prefer reading comic books to watching cartoons. 8. Yesterday, I didn't go to the movies because I had to stay home to do my homework. 9. My father worked as an engineer at a printing factory two years ago. 10. Loan learns English by talking to foreigners on the internet whenever she has free time. Here are the rewritten sentences in correct grammatical order: 1. Thu's uncle lives in Ho Chi Minh City and has a small flower shop there. 2. It's not a good idea for students to spend too much time playing computer games. 3. When the children go on holiday to Sam Son, they will build sandcastles on the beach. 4. After hearing the rule, I decided not to take part in the competition. 5. Lan lives near her school, so she often goes to school on foot. 6. You should give up smoking because it's not good for your health. 7. It is difficult for Helen to buy a new apartment when she doesn't have a lot of money. 8. Phuong spends time learning English because she wants to be better than her sister. 9. Last Christmas, the children were happy because they received a box of chocolates from Santa Claus. 10. You shouldn't eat too many sweets at night because they're not good for your teeth. Here are the corrected sentences: 1. The children are not learning in the room now, but they are playing computer games. 2. My teacher encourages us to use a dictionary whenever we are unsure of the meaning of a word. 3. John always tries his best to get the highest score in his class. 4. My cousins enjoy playing water sports, but their parents do not allow them to. 5. My sister works as a nurse at the Children's Hospital, so she enjoys looking after my son. 6. Although Sally likes flowers very much, she does not have time to water them. 7. It is not good for you to drink before driving because you may get into an accident. 8. My brother decided not to buy a new car because you may not have enough money. (However, this sentence is still unclear. A more natural way to express this would be: My brother decided not to buy a new car because he thought he might not have enough money.) 9. Yesterday, Linda was upset because she couldn't do anything to help her sister. 10. After driving for many hours, Tom stopped at a small shop to buy a bottle of water. Here are the corrected sentences: 1. Tuan has a headache because he works hard under the sun. 2. I suggest calling the police before taking this man to the hospital. 3. She goes to school on foot because her school is near her house. 4. It's not easy for Tim to become the best in his English class. 5. Talking to friends is one of the most common ways to relax in many countries. 6. Jim usually doesn't go camping on weekends, but he goes fishing. 7. I'm happy to hear that you and your family are well. 8. After spending two hours planning where to go on holiday, our team decided to visit Hue for three days. 9. Now, my mother is going to the supermarket to buy some food for dinner. 10. Huy's uncle didn't recognize him because he looks different from his father. Here are the answers to the given exercises: 1. We didn't go on a picnic yesterday because it rained heavily. 2. Mai was absent from class yesterday morning because she was ill. 3. I hope to visit Ho Chi Minh city one day. 4. He had a bad headache yesterday, so he stayed home. 5. Football is the most popular game in the world. 6. Doing exercise regularly helps you keep fit and stay healthy. 7. You had better take a rest and stop drinking cold water. 8. She is reading an interesting story about two poor boys. 9. I had a loaf of bread and a carton of milk for breakfast. 10. I think skating is more interesting than mountain-climbing.