Cho hình chữ nhật ABCD có AB=20. Kẻ đường cao AH vuông góc với BD tại H sao cho AH=12
A) Tính AD và chu vi, diện tích ABCD.
B) Tính diện tích AHB, AHC

Rewrite each of the following sentences in another way so that it means almost the same as the sentence given before it.
1. The souvenirs are not so expensive, so most tourists can afford to have one.
-> Because....
2. Those young men spent a month travelling through Viet Nam by motorbike.
-> It took....
3. You may not know how beautiful the site is if you don't visit it once.
-> Unless....

Tính các biểu thức sau:
A) √0,4.√250
B) √120.√0,9.√48
C) √27.√12

Tính nhanh các căn thức sau:
A) √54.√80
B) √72.√50
C) √20.√50
D) √242.√48
E) √98.√28
F) √63.√40

Rewrite the second sentence so that it has a similar meaning to the first one. Use the word in brackets.
1. The football match has been delayed for one week due to the tropical storm. (put)
->
2. A gas station basically contains two gas pumps and a vending machine. (of)
->
3. He has trying to reduce the amount of sugar because he was on a diet. (down)
->
4. Thought Sally is Mr. Harris's daughter, she doesn't look like him at all. (take)
->
5. All of us were astonished to see Vanessa appear at the Halloween party last night. (turn)
->
6. Matilda can't wait to receive the result of her annual health check-up. (forward)
->
7. My mother usually pays me short visits without prior notice. (in)
->
8. When Ryan first joined the company, he found it hard to make the same progress as other people in his team. (keep)
->
9. I met my primary school teacher by chance while I was jogging in the park. (into)
->
10. Mrs. Bailey continued to play tennis even after she retired. (carried)
->
11. We've tried to make Diana feel better after she failed her job interview. (cheer)
->
12. He advised me to discuss this plan with Vicky before investing in the property market. (over)
->

Use the suggested words/phrases to make a complete sentence.
1. lot/advantages/live/city/attract/young/such/better education/more entertainment.
->
2. travel/service/city/magnificent/comfortable.
->
3. it/trend/that/rural people/migrate/rural/urban places/day by day.
->
4. Many motorized vehicles/cause/lot/traffic problems/city life/nowadays.
->
5. People/live/cities/have/more access/higher education.
->

Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it.
1. My father will take me to the cinema this weekend.
-> I...
2. The Browns have spent a lot of time wandering around the city.
-> It has...
3. Ho Chi Minh City is the biggest city in Viet Nam.
-> No city...
4. "Which is the most liveable city in Viet Nam?" asked he.
-> He asked me...
5. There is a great variety of things and food from different countries for people in Sydney, Australia.
-> People in Sydney, Australia...

Choose the word which has the underlined part pronounced differently from the rest
1.A.variety B.affordable C.asset D.urban
2.A.packed B.polluted C.crowded D.decided
3.A.determine B.conflict C.cosmopolitan D.exciting
4.A.score B.worst C.her D.work
5.A.vegetable B.organize C.agency D.teenage

Tìm điều kiện xác định của các căn thức sau:
A) √2(x-1) - 5(2-3x)
B) √3(x-2) - (x+1)
C) √(x-1)² - (2-x)²
D) √4-5(2-3x)
E) √4/2x+1
F) √-3/3x-5
G) √4x-1/-3
H) √x²+1

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions
3. A. During B. Education C. Eradicate D. Desert
4. A. Inherits B. Declares C. Corresponds D. Covers

Underline the correct answers.
1. Though/As/After the weather today is rainy and foggy, they still camp in the mountain.
2. You must complete mandatory questions before/so that/while we can examine whether you're eligible for the vaccine or not.
3. If/In order that/Since these are high-quality sneakers, they will last longer than casual ones.

Join each pair of sentences, using the word of phrase in brackets.
1. The Water Project digs some wells in Africa. People can have safe and clean water for daily use. (so that).
->
2. The plane started to take off. My older sister nervously held my hands. (when).
->
3. Rosé missed the beginning of the lecture. She was late for class. (since).
->
4. Mr. Allen went to Australia last year. He wanted to do research on kangaroo's habitat. (in order to).
->
5. He has been living in Finland for ten years. He never gets used to the cold. (although).
->
6. She had graduated from Yale University. She planned to set up a small business on her own. (after).
->
7. My father will give us a ride to the shopping mall. He has dropped my mother off at the bakery. (as soon as).
->
8. Many children in Uganda are forced to work at young ages. Their families are too poor. (because).
->
9. She goes to bed. She always says a prayer for her family's good health. (before).
->
10. Food should be stored in a refrigerator at 5°C or below. It can remain fresh longer. (in order that).
->
11. Mark keeps eating junk foods. He is at high risk of obesity and type 2 diabetes. (even though).
->
12. Wendy and Joy totally concentrated on their work. The clock struck twelve. (until).
->
13. Damian's parents felt very disappointed in him. His exam results were bad. (owing to).
->
14. She went to a French bakery. She wanted to buy some sandwiches and chocolate muffins. (so as to).
->
15. I was driving at midnight. A black cat suddenly ran across the street. (while).
->

Make up wishes from the prompts.
1. Sometimes/my grandmother/wish/she/live/in the countryside/because/she/not/like/noisy places.
->
2. I/wish/no one/be suffering/hunger and poverty.
->
3. We/wish/everybody/raise/their awareness/about/environmental issues.
->
4. Henry/wish/he/be/taller/so that/he/could/participate/the basketball team.
->
5. I/wish/Irene and I/be going on vacation/together/at Christmas.
->
6. Mara/wish/her parents/permit/her/make her own decision.
->
7. He/wish/there/be/four seasons: spring, summer, autumn, and winter/in his country.
->
8. My son/wish/he/can/play football/as well as/Lionel Messi.
->
9. We/wish/our government/come up with good plans/support/the homeless.
->
10. I/wish/young people/not/spend/too much time/play online games.
->
11. Angela/wish/she/can/communicate/the foreigners/in English.
->
12. Violet/wish/her father/not/drink too much wine/because/it/be/harmful/his health.
->

For each situation, write a sentence using a wish construction.
1. I'm sorry i can't take part in the Royal Chess Club with all of you.
-> I......
2. Tiffany would like to buy a new laptop, but she doesn't have enough money.
-> Tiffany.....
3. What a pity! I don't have time to travel to Florida.
-> I.....
4. Liam enjoys swimming. However, his house is far from the beach.
-> Liam......
5. I'd like my younger sister to concentrate more on her studies.
-> I.....
6. There is no organisation for environmental management in their area.
-> They.....
7. It's a pity we are having an English class at the moment.
-> I.....
8. Daniel is upset because he doesn't know how to ride a horse like most of his friends.
-> Daniel......
9. Lauren's parents never allow her to stay overnight with her friends in their homes.
-> Lauren.....
10. She feels very annoyed because the neighbors are making so much noise.
-> She.....
11. It's a pity Jessica can't attend my birthday party this weekend.
-> I.....
12. Oh dear! It is raining heavily outside now. We can't go for a walk.
-> We......

Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it
1. This is the first time i've been to a craft village. (Never)
->
2. The villagers embroidered this painting beautifully. (Was)
->
3. The visitors went to Hue so that they could buy some bai tho conical hats. (In order to)
->
4. That hand-embroidered picture is so expensive that i can't buy it. (Such)
->
5. We will discuss the local traditional craft in the coming conference. (Discussion)
->

Use the suggested words/phrases to make a complete sentence
1.growing/population/come/cost/greenhouse/gases/climate change.
->
2.Renewable/energy/sources/be/great/way/combat/carbon/emissions.
->
3.lack/biodiversity/put/food/chain/water/sources/other/resources/risk.
->
4.Education/protection/be/keys/combat/biodiversity loss.
->
5.protect/remaining/forests/humans/simply/stop/cut/down trees.
->

Cách gọi tên Axit, Bazơ với muối 

Mn ơi cho mình xin đoạn mở bài thuyết minh về bánh xèo với:(

Kate was amazed at her parent's_________(generous) when they gave her a car for her eighteenth birthday.

Some people say that money brings___________(happy), but i'm not so sure