1: Một thửa ruộng có nửa chu vi 180 m , chiều rộng kém chiều dài 30m. a, Tính diện tích thửa ruộng đó. b, Người ta trồng khoai trên thửa ruộng cư 10 m2 thu được 20kg khoai . Tính số khoai thu được trên thửa ruộng đó. 2: Khi chia một số với 17 ta được thương là 11 và số dư là số lớn nhất có thể . Tìm số đó.

Cho hình thang ABCD có AB song song với CD. gọi O là giao điểm của AC và BD, đường thẳng qua O cắt AD,BC tại E và F. CMR: a) DE/DA = CF/CB b) OE = OF

Exercise 1: Thành lập dạng quá khứ đơn cho những động từ sau đây. live - carry - buy - go - read - arrive - start - study - have - tell – give - meet - write - come - build - know - believe – play - try - send - speak - tell - take - find - pay – teach - permit - be - begin - bring - stop - sit - watch - can - work - leave - sing - break - make- hold - hear - do - learn - lose - Exercise 2. Choose the correct answer. 1. They __________ the bus yesterday. A. don’t catch B. weren’t catch C. didn’t catch D. not catch 2. My sister __________ home late last night. A. comes B. come C. came D. was come 3. My father __________ tired when I __________ home. A. was – got B. is – get C. was – getted D. were – got 4. What __________ you __________ two days ago? A. do – do B. did – did C. do – did D. did – do 5. Where __________ your family _______ on the summer holiday last year? A. do – go B. does – go C. did – go D. did – went 6. When I (meet) ………….Jane last year, she (be)………… a student. 7.They (get) …………married when they (be)………….. in Chicago. 8. She (have)…………… a fight with her boyfriend last week. 9. He (study) …………..Spanish when he was at University. 10. Last week, my uncle (drive)…………….. me to the school by his new car. 11. She (not/take) ………………….part in the contest three years ago. 12. She (not/ do) ……………….her homework before going to class yesterday. 13. Our cat (catch) …………………a big mouse this morning. 14. In 2001 our class (make)…………………….. a trip to Norwich. 15. (you/have)…………………………… a nice weeken in Twain? Exercise 3: Complete the sentences with the words given ( Hoàn thành câu với từ gợi ý). 1. They/ watch / good football match / TV last night. ……………………………………………………………………………………… 2. Peter /send / letter /Marry/ yesterday morning. ………………………………………………………………………………………3. It / humid / Lang Son / last week. ……………………………………………………………………………………… 4. David /visit/ Halong Bay/ 2 years ago ? ……………………………………………………………………………………… 5. How long/ it/ take/you/ draw/ this picture?. ………………………………………………………………………………………

Giải với ạ ...............help me

. 38 Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. We’re not staying in the same hotel, so we can’t share a room. A: If we were staying in the same hotel, we could share a room. B: If we are staying in the same hotel, we can share a room. C: Unless we were staying in the same hotel, we could share a room. D: If we stay in the same hotel, we could share a room

Choose the best answer A, B, C or D to complete the sentence. Question 9: If I _______ you, I ______ volunteer to clean the beach. A: was/ will B: am/ will C: am/ would D: were/ would 2 Choose the best answer A, B, C or D to complete the sentence. Question 11: ___________ there was a lot of acid rain, many botanical species died last year. A: Since B: So C: But D: Although 3 Choose the sentence A, B, C or D that best combines the given sentences. Question 24: There are so many billboards in our city. People cannot enjoy the view. A: If there were not so many billboards in our city, people couldn’t enjoy the view. B: If there were many billboards in our city, people could enjoy the view. C: If there were not so many billboards in our city, people could enjoy the view. D: If there are not so many billboards in our city, people can enjoy the view. 4 Choose the best answer A, B, C or D to complete the sentence. Question 10: Too much use of electric lights in cities may cause ___________ pollution. A: thermal B: water C: visual D: light 5 Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. Question 14. Lan: “________________” Hung: “That’s the reason why I usually have headaches.” A: The river is seriously contaminated. B: You ate too much raw food tonight. C: Our city has too much noise pollution. D: This song sounds great. 6 Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) to each of the following questions. Question 15: Many fish in the lake near my house have died because of the polluted water. A: contaminated B: pure C: treated D: drinkable 7 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. The Earth Day comes from the idea of a former US politician Gaylord Nelson. He was worried about the world pollution, and the health of plants and animals. In 1969, he decided that the world should have a special day to teach people about how to make environment better. His idea became popular and on 22 April 1970 the first Earth Day was celebrated. Since then, environmentalists have used the day to educate people about their roles in protecting our planet. Earth Day finally became a global celebration around the world. On this day, people come together to talk about global warming, protecting rare animals and saving energy sources. Question 19: The word “their” in the second paragraph refers to ______. A: politicians’ B: people’s C: Dr. Nelson’s D: environmentalists’ 8 Choose the word whose stressed pattern is pronounced differently from the others. A: effect B: litter C: affect D: pollute 9 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. The Earth Day comes from the idea of a former US politician Gaylord Nelson. He was worried about the world pollution, and the health of plants and animals. In 1969, he decided that the world should have a special day to teach people about how to make environment better. His idea became popular and on 22 April 1970 the first Earth Day was celebrated. Since then, environmentalists have used the day to educate people about their roles in protecting our planet. Earth Day finally became a global celebration around the world. On this day, people come together to talk about global warming, protecting rare animals and saving energy sources. Question 17: The Earth Day was first celebrated in ______. A: before 1969 B: 1969 C: 2015 D: 1970 10 Choose the sentence A, B, C or D that is closest in meaning to the given sentence. Question 22: I don’t have enough money, so I don’t buy seafood. A: If I didn’t have enough money, I wouldn’t buy seafood. B: If I had had enough money, I would buy seafood. C: If I have enough money, I will buy seafood. D: If I had enough money, I would buy seafood. 11 Choose the word whose stressed pattern is pronounced differently from the others. A: botanical B: physical C: historic D: aquatic 12 Choose the sentence A, B, C or D that best combines the given sentences. Question 25: We shouldn’t swim in this lake. Water is highly polluted. A: We should swim in this lake because water is highly polluted. B: We shouldn’t swim in this lake although water is highly polluted. C: We shouldn’t swim in this lake so that water is highly polluted. D: We shouldn’t swim in this lake because water is highly polluted. 13 Choose the best answer A, B, C or D to complete the sentence. Question 12: The polluted water__________ in the death of the fish. A: causes B: results C: leads D: makes

Một đầu máy xe lửa kéo một đoàn tàu chuyển động đều với vận tốc 54km/h.Biết lực kéo của đầu máy là 5.10 mũ 5 N.Tính: a.Công suất của đầu máy đó b.Công của đầu máy thực hiện khi chuyển động trên đoạn đường dài 12km.

Giúp mình với ạ Cần chọn đáp án thui

Mng giúp mik với mik đang cần gấp ạ có thể chỉ cần dàn ý thôi nhé Cảm ơn mng mik sẽ cho 5 sao nhé Nghị luận xã hội (tư tưởng đạo lý)

mua 12 quyển vở hết 54000 đồng. Hỏi mua 60 quyển vở như thế hết bao nhiêu tiền? tóm tắt