hướng dẫn mình với ạ bài này dễ mà

Một người đi xe đạp từ A đến B với vận tốc 12km/h. Cùng lúc đó một người đi xe máy cũng đi từ A đến B với vận tốc 30 km/h. Biết rằng người đi xe đạp tới B chậm hơn người đi xe máy là 15 phút. Tính quãng đường AB.

MULTIPLE CHOICE: I. PRONUNCIATION 1. Choose the word whose underlined part is pronounced differently from that of the others in each group. A. son B. hold C. show D. old 2. Choose the word whose main stressed syllable is placed differently from that of the others in each group. A. literature B. humorous C. commercial D. Europe II. VOCABULARY AND GRAMMAR Choose the words ( from A, B, C or D ) to complete the sentences. 3. One of ………………………………………… things you need to do is keeping it secret. A. most important B. more important C. the most important D. the more important 4. What is the capital of Greece? - ……………………………………………………..…….. A. Amsterdam B. Athens C. Stockholm D. Sydney 5. Has our city been hot …………………………….………………….…..……….. before? A. as this B. as this time C. like time D. like this time 6. People in Tokyo are very polite …………………………….….………..………. friendly. A. or B. and C. but D. so 7. David ……………….….. London 2 years ago and I …………………….. him since then. A. left/ hadn’t seen B. left/ haven’t seen C. was leaving/ haven’t seen D. left/ didn’t seen 8. Britain's most common …………..…. activities are watching TV and films, and listening to the radio. A. free B. leisure C. good D. popular 9. The package includes a tour of Sydney’s famous …………………..……………………... A. Opera House B. Eiffel Tower C. Big Ben D. White House 10. That city is most famous ………………….…………………..………. its fashion shops. A. to B. with C. for D. of III. READING Read the following passage and then choose the correct answers. San Francisco, a very hilly city, is in the San Francisco Bay. Although there are many modern skyscrapers in the city centre, houses in the suburbs are in the styles of the 19th century. The celebration of the Chinese New Year in San Francisco's Chinatown is one thing that you should not miss. You can find the best food from around the world: Brazilian, Indian, Japanese, Korean, Mexican, Russian, Thai, Chinese and much more. Don't forget to visit a jazz club or an outdoor coffee shop to enjoy good coffee and fresh air. You should visit Mission Dolores, an old church built by the Spanish in the 18th century. 11. Which of the following sentences is true about San Francisco? A. San Francisco is not a very hilly city. B. San Francisco is not in the San Francisco Bay. C. San Francisco has only old houses. D. San Francisco is a city with modern skyscrapers in the city centre. 12. What is second paragraph about? A. nightlife B. festivals C. scenery D. architecture 13. Where can we have coffee and enjoy fresh air? A. Chinatown B. Old houses C. Churches D. Outdoor coffee shops 14.Which of the following sentences is NOT true about San Francisco? A. San Francisco is in the San Francisco Bay. B. The celebration of the Chinese New Year in San Francisco's Chinatown is very interesting. C. You can only enjoy American and Chinese food in San Francisco. D. You should enjoy jazz at a jazz club in San Francisco. 15.By whom was Mission Dolores built in the 18th century? A. By people from Germany. B. By people from Spain. C. By people from Brazil. D. By people from Europe. IV. WRITING * Choose the letter A, B, C or D to complete the sentences with given words. 16. The Thai name / Bangkok / the / long / world. A. The Bangkok of Thai name is the longest in the world. B. The Thai name of the longest is Bangkok in the world. C. The Thai name of Bangkok is the longest in the world. D. The Bangkok is the longest Thai name of in the world. 17. He / enjoy / see / London Eye / London. A. He enjoys seeing the London Eye in London. B. He enjoys London seeing the London Eye in. C. He enjoy seeing in London the London Eye. D. He enjoy the London Eye seeing in London. 18. You / should / visit / Statue of Liberty when /visit / New York. A. You should visit the Statue of Liberty when visiting New York. B. You should visit the Statue of Liberty when visiting New York. C. You should visit the Statue of Liberty when visiting New York. D. You should visit the Statue of Liberty when visiting New York. * Choose the letter A, B, C or D to complete the second sentence so that it means the same as the first one. 19. We haven’t been to Hanoi for three years. A .The last time we go to Hanoi was three years ago. B .The last time we went to Hanoi were three years ago. C .The last time we went to Hanoi was three years ago. D .The last time we went Hanoi was three years ago. 20. No other tower in England is as famous as Big Ben. A. Big Ben is most famous tower in England. B. Big Ben is the most famous tower in England. C. Big Ben is the most famous tower at England. D. Big Ben are the most famous tower in England. *************************************

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ảnh hưởng của các yếu tố sinh thái vô sinh đến con người ?

It was such rotten meat that it had to be thrown away => The meat was ................................................................. 2. You can't visit the USA unless the have a visa. => If you ..................................................................................

Complete using the correct form of the words in the box. Commute - deliver - earn - gain - make - sack - win 1.No sooner had Dezil ....... the lottery than he decided to quit his job. 2. How long does it take you to .......... to work everyday. 3. How much does a state school teacher.....each year? 4. Over a hundred workers were.....redundant when the factory closed. 5. Our next-door neighbour was.... for stealing company property. 6. Does your local supermarket ....? 7. Rarely have I ....so much valuable experience in such a short space of time. Ai đó giúp tui vớiiii

tìm các tác phẩm văn học lớp 6 hc 7 nòi về thời lê sơ

Giúp e phần tự luận với ạ e đang cần gấp

Cho 20g hỗn hợp kim loại gồm kem ,bạc tác dụng hoàn toàn với 100ml dung dịch Cuso4 1M .tính thành phần phần trăm theo khối lượng mỗi chất trong hỗn hợp kim loại ban đầu.