20. It is twenty-five past ...................... . A. fifty B. a quarter C. four o’clock D. eleven - Đáp án: C. four o'clock III. Find and correct the mistakes. 1. I’m twenty-one years old and I’m a worker. 2. She and he go to work on foot. 3. That’s my sister over there. She is standing next to the window. 4. Let’s go shopping! 5. My friends don't like to watch TV after school. 6. He is taller of the two boys. 7. There is a big eraser on the desk. 8. We don’t understand what you are saying. 9. How many men are there in the room? 10. We can’t go out because it's raining. IV.Give the correct form of the verbs. 1.She (have) is having a party tonight. 2.They are not watching television at the moment. 3.Let’s help your friend, Nam.She is doing her homework. 4.What are you doing this summer vacation? - I am visiting Ha Long Bay. 5.She can speak English very well. 6.It often rains in summer. V.Give the correct form of the words 1.We must be careful when we cross the road.CARE 2.There are lots of beautiful mountains in Viet Nam.BEAUTY 3.I’m Vietnamese.What’s your nationality?NATION 4.This is the tallest building in our town.TALL 5.This tree has a lot of green leaves.LEAF 6.I don’t like sunny weather.SUN 7.Mai’s sister is a singer.SING 8.His teeth are small and white.TOOTH 9.Lee is from China.She is Chinese.CHINA 10.It’s very noisy in the city.NOISE VI.Rewrite each of the following sentences, beginning with the given words: 1.There is a small pond in front of Lam's house. 2.You can play games in the afternoon but you must do homework in the evening. 3.Does Lan walk or ride her bike to school? 4.When it's hot, we often go swimming. 5.What is there in front of your house? 6.Where is your father sitting now? 7.My class starts at seven in the morning. 8.I don't often go swimming with friends. VII.Rewrite each of the following sentences, beginning with given words: 1.Does your class have thirty students? - Are there thirty students in your class?