Đốt cháy hoàn toàn 0,05 mol ankan A rồi dẫn sp cháy qua bình chứa nước vôi trong dư thu được 20 gam kết tủa sau thí nghiệm khối lượng bình chứa nước vôi là

I. Give the correct tense of the verb in brackets : 1.Look ! A man ( run) ….. after the bus. He (want) …….………. to catch it. 2.The baby (cry) ……........……………….because he is hungry now. 3.Tom is ill now. He (become) …..…………… ill 3 days ago. 4.It ( rain) ………..............……..…now. It ( rain) ………......……………..for four hours. 5.I (stay) ……….....……….. until you (come) …………………… tomorrow. 6.This is the best wine I (drink) ……………………. 7.He is reading “WAR AND PEACE ”. How long ……........… she ……....………. (read) ? 8.Shakespeare (write) ......……....…………. a lot of plays. 9.I’m busy at the moment. I (decorate) ….......................………………….. the sitting room. 10.I (buy) ………...…… a new house last year, but I (not sell) ……....………….. my old house yet, so at the moment I ( have) …………....…… two houses. II.Complete the sentences using the correct form of the adjerctives or adverbs in brackets : 1.Mary is (pretty) ........................................................ as her sister. 2.A new house is (expensive) ............................................... than an old house. 3.His job is (important) .................................................... than mine. 4.Of the four ties, I like the red (well) ....................... 5.Nobody is (happy) ............................................ than Miss Snow. 6.Today English is the (international) ............................................................. of language. 7.John is much (strong) ................................................ than I thought. 8.Benches are (comfortable) ......................................... than arm-chairs. 9.Bill is (good) ................................ than you thought. 10.Mr Bush is the (delightful) ............................................. person I have ever known. 11.Dick is the (careful) ............................................... of the three workers. 12.Sam’s conduct is (bad) ................................. than Paul’s 13.Thanks to the progress of science, human life is (good) .................... and (good) .................... 14.The teacher speaks English (fluently) .................................................... than we do. 15. The competition makes the price of goods (cheap) ....................... and (cheap) ....................... 16.Is this book (interesting) ..................................................... than the one you read last week ? 17.My cat is the (pretty) ...................................... of the two. 18.This vegetable soup tastes very (well) ........................... 19.Pil is the (happy) ................................ person we know. 20.These shoes are the (little expensive) .............................................. of all. III. Fill in each blank with the correct form of the word given in capital. 1. My brother is a at Vietnam National University, Ha Noi. STUDY 2. That paints beautiful pictures. ART 3. Ask the if you can borrow this book. LIBRARY 4. That ...plays a lot of different instruments. MUSIC 5. Lan’s brother is a He plays it very well. PIANO 6. If the machine goes wrong, tell the ENGINE 7. We have a who comes twice a week. GARDEN 8. Phone the if the lights don’t work. ELECTRIC 9. Miss Quyen is a She travels a lot. JOURNAL 10. You pay the ... She’s that lady over there. CASH IV. Rewrite sentences but not change the meaning of the sentences. 1. Listening to music at home is more interesting than going to the concert -> I prefer 2. We didn’t enjoy the trip because of the heavy rain -> The heavy rain prevented 3. You shouldn’t eat too much candy. -> You’d 4. He is a slower and more careful driver than I am -> He drives 5. The visitor spoke so quickly that I couldn’t understand what he said. -> The visitor spoke too ……………………………………………………. 6. How heavy was your son last summer? -» What……………………………………………………………………… 7. Be sure to come back home before 9.30! Remember…………………………………………………………….. 8.Listening to music at home is more interesting than going to the concert. I prefer…………………………………………………………………. 9.This girl is the most hardworking in our class. No one…………………………………………………………………… 10.You should not eat too much meat. You'd……………………………………………………………………….

Question 3 : Read the following passage and choose the best answer to each question (1.0 point). English is one of the most popular languages in the world. It comes second in the number of speakers after Chinese. In Vietnam, more and more people are studying English and they consider it a key to success. However, not everyone knows how to learn English effectively. The best way to improve the four skills: speaking. Irstervng, reading, and writing is to practice regularly. You should make use of every opportunity to speak English with friends in class or at English speaking clubs or ourselves in front of the mirror. Learning by heart all the words does not help much if you do not read a lot because you will easily foeget what you have learnt. Reading books, listening to radio and watching films are better ways to memorize words. Besides. English learners should not be so shy because making mistakes is unavoidable in learning foreign languages. Practicing speaking a lot is a good way to correct your mistakes. 1. How many skills are mentioned in paragraph 2? A. 2 B. 4 C. 5 2. The word "memorize" in paragraph 2 is CLOSEST in meaning to ............... A. remember B. forget C. communicate 3. A good way to correct your mistakes Is A. avoiding speaking English B. stopping learning English C. practicing speaking English a lot 44. According to the passage, which of the following statements is TRUE? A. You should never speak English with yourselves. B. Many Vietnamese people consider English a key to success. C. English learner should be shy if they make mistakes. 5. The passage is mainly about ....................... A. how to learn English effectively. B. people who study English in Vietnam. C. how to read books, listen to radio and watch films. Thông cảm hơi ít điểm ,bởi vì mình cần điểm để lên hạng ,mong được giúp đỡ

Từ đoạn trích trong phần đọc hiểu, anh/chị hãy viết một đoạn văn (khoảng 200 chữ) trình bày suy nghĩ về giá trị của tuổi trẻ. Giúp e vs ạ

Đặt câu vs từ mới - head for + a place - leave for + a place -must see -illusion -holo gram

I. Give the correct tense of the verb in brackets : 1.Look ! A man ( run) ….. after the bus. He (want) …….………. to catch it. 2.The baby (cry) ……........……………….because he is hungry now. 3.Tom is ill now. He (become) …..…………… ill 3 days ago. 4.It ( rain) ………..............……..…now. It ( rain) ………......……………..for four hours. 5.I (stay) ……….....……….. until you (come) …………………… tomorrow. 6.This is the best wine I (drink) ……………………. 7.He is reading “WAR AND PEACE ”. How long ……........… she ……....………. (read) ? 8.Shakespeare (write) ......……....…………. a lot of plays. 9.I’m busy at the moment. I (decorate) ….......................………………….. the sitting room. 10.I (buy) ………...…… a new house last year, but I (not sell) ……....………….. my old house yet, so at the moment I ( have) …………....…… two houses. II.Complete the sentences using the correct form of the adjerctives or adverbs in brackets : 1.Mary is (pretty) ........................................................ as her sister. 2.A new house is (expensive) ............................................... than an old house. 3.His job is (important) .................................................... than mine. 4.Of the four ties, I like the red (well) ....................... 5.Nobody is (happy) ............................................ than Miss Snow. 6.Today English is the (international) ............................................................. of language. 7.John is much (strong) ................................................ than I thought. 8.Benches are (comfortable) ......................................... than arm-chairs. 9.Bill is (good) ................................ than you thought. 10.Mr Bush is the (delightful) ............................................. person I have ever known. 11.Dick is the (careful) ............................................... of the three workers. 12.Sam’s conduct is (bad) ................................. than Paul’s 13.Thanks to the progress of science, human life is (good) .................... and (good) .................... 14.The teacher speaks English (fluently) .................................................... than we do. 15. The competition makes the price of goods (cheap) ....................... and (cheap) ....................... 16.Is this book (interesting) ..................................................... than the one you read last week ? 17.My cat is the (pretty) ...................................... of the two. 18.This vegetable soup tastes very (well) ........................... 19.Pil is the (happy) ................................ person we know. 20.These shoes are the (little expensive) .............................................. of all. III. Fill in each blank with the correct form of the word given in capital. 1. My brother is a at Vietnam National University, Ha Noi. STUDY 2. That paints beautiful pictures. ART 3. Ask the if you can borrow this book. LIBRARY 4. That ...plays a lot of different instruments. MUSIC 5. Lan’s brother is a He plays it very well. PIANO 6. If the machine goes wrong, tell the ENGINE 7. We have a who comes twice a week. GARDEN 8. Phone the if the lights don’t work. ELECTRIC 9. Miss Quyen is a She travels a lot. JOURNAL 10. You pay the ... She’s that lady over there. CASH IV. Rewrite sentences but not change the meaning of the sentences. 1. Listening to music at home is more interesting than going to the concert -> I prefer 2. We didn’t enjoy the trip because of the heavy rain -> The heavy rain prevented 3. You shouldn’t eat too much candy. -> You’d 4. He is a slower and more careful driver than I am -> He drives 5. The visitor spoke so quickly that I couldn’t understand what he said. -> The visitor spoke too ……………………………………………………. 6. How heavy was your son last summer? -» What……………………………………………………………………… 7. Be sure to come back home before 9.30! Remember…………………………………………………………….. 8.Listening to music at home is more interesting than going to the concert. I prefer…………………………………………………………………. 9.This girl is the most hardworking in our class. No one…………………………………………………………………… 10.You should not eat too much meat. You'd……………………………………………………………………….

1. Three weeks _______not enough holiday. A. are B. were C. was D. been 2. Each of you ____ a share in the work. A. having B. has C. to have D. have 3. A number of students ____ volunteered to the job. A. have B. has C. to have D. having 4. Linguistics ____ out the ways in which languages work. A. find B. finding C. to find D. finds 5. The Philippines ____ of more than 7,000 islands. A. consist B. consisting C. consisted D. consists 6. The United Nations ____ its head quarters in NewYork city. A. have B. having C. has D. to have 7. One of my neighbours ____ curious about other people’s private life. A. being B. were C. is D. been 8. Tom doesn’t agree but the rest of us ____. A. does B. done C. do D. doing 9. There ____ a few flowers in this garden last summer. A. being B. were C. are D. is 10. A large number of reporters ____ at the meeting yesterday. A. being B. were C. are D. is

Tiêm hoocmôn testosteron vào cá cái mới nở, con cá này lớn lên có kiểu hình thế nào? Vì sao?

Tìm y: y nhân 2 = 2/3 = ................... = ................... Giúp mik với

a)2/n-1 b)-2/-n+2 c)-3/2n-1 tìm các số nguyên n sao cho các phân số sau có giá trị là số nguyên các bạn nhanh giúp mình nha