I. Complete the sentences with must or mustn't. 1. You help your mother with the heavy box. 2. It’s very cold. You go out. 3. You look after the house when your parents are awaff 4. You wash your face in the morning. 5. You take your umbrella because it’s raining. 6. You drink that milk, it’s very hot. 7. You make noise in the class. 8. It’s dangerous, you touch that wire. 9. You be rude to your teacher.

IV. Complete the sentences with the correct form of do or play. 1. Do you often exercises? 2. My Dad football for the town team when he was young. 3. My sister enjoys______ exercises table tennis in her free time. 4. My brother basketball for the school team. 5. We gymnastics at school yesterday. 6. I like tennis. 7. My friend judo twice a week. 8. My mother yoga at the new sports centre.

Có 21,6 g hỗn hợp chất rắn E gồm Fe và Mg. Cho hỗn hợp vào trong V(ml) dung dịch chứa H2SO4 0,3M và HCl 0,2M. Dẫn khí sinh ra qua ống đựng 40g CuO nóng (dư) dến khi kết thúc phản ứng thì thu được 35,2g rắn (F). a. Chứng minh sau phản ứng với axit, kim loại dư? Tính V? b. Hòa tan hết 21,6g E bằng lượng tối thiểu m (g) dung dịch dung dịch H2SO4 80% đun nóng thì thu được 11,2 lít SO2 (sản phẩm khử duy nhất) ở đktc. Tính m và khối lượng mỗi chất trong hỗn hợp (E). Mn giải thích kỹ giúp e với luôn được không ạ!

Ở thời đại phồn thịnh của khủng long chúng hoạt động ở mấy môi trường?

II. Put the verbs into the correct tense form. 1 . I _________ (have) a great rime in Hoi An at present 2. There _________ (be) always a lot of traffic, day and night. 3. My friend, Michelle, and I _______ (spend) five days in Hoi An last year. 4. Outside the sun __________ (shine) so I’m off to get some fresh air. 5. We usually ___________ (stay) at home for a holiday, but this holiday we __________ (travel) abroad. 6. __________ (be) there any bookstores in your neighborhood? 7. My grandma ____________ (not like) living in the city. 8. How ________ (I/ get) to the railway station? - Go straight ahead then turn left. 9. Where ________ (you/ go) now? - We ________ (go) to Tan Ky House. 10. _________ (be) there a post office nearby? - No. There ________ (be) no post offices near here.

I. Give the correct form of verbs in the blank. 1. Hoa always (help) her parents on their farm in her free time. 2. Our summer vacation (start) in June and (last) for almost three months. 3. What do you like (do) during your vacation? 4. It’s ten to seven. Hurry up or you (be) late for work. 5. We (go) swimming every afternoon. 6. Hoa (have) breakfast with her uncle now. 7. He (not come) to the party tomorrow night. 8. They (talk) about Hoa’s work at the moment.

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Complete the conversation with the correct form of the verbs in brackets in the present continuous. Jack: I'm bored. Nick: Why don't you find something to do? Jack: What can I do? Nick: There are lots of things you can do. This is what I (1. do) this weekend. On Friday evening I (2. meet) Jane. We (3. go) to the cinema. Then in Saturday, Tom and I (4. play) table-tennis. Then we (5. have) lunch with Sam. After lunch, Tom and Sam (6. start) their new judo classes. I (7. not go) with them because my dad (8.take) me to a basketball match. It's my mum's birthday on Sunday. She (9. not have) a big party. We (10. have) lunch at a nice restaurant near our house. Jack: Wow. You are busy. Can I come with you to the cinema on Friday? Nick: Of course, you can, Jack.

giúp em với ạ!!! em đang cần gấppp

Complete the text. Use the present simple. My best friend My best friend is Hannah. She (1. live) next door to me. We (2. go) to the same school but we are in different classes. I (3. walk) to school but Hannah (4. go) by bike, because she always (5. get up) late. After school we (6. finish) _____ our homework first, then we (7. listen) to our favourite music. I (8. like) R&B, but Hannah (9.hate) it. She (10. think) it’s boring. She (11. love) rock music.