Buses and subways in Seoul, the normally crowded South Korean capital, were unusually quiet on Monday, and social media was (1) ................ with posts with the hashtag “work from home.” South Koreans work some of the longest hours in the world, and companies tend to disapprove of allowing employees to (2) ............... - work from home, making use of the internet, email and phone
This drastic departure from the conventions of corporate culture are a sign of how the country is fighting to slow the (3) .............. of the novel coronavirus.
For the past several days the country’s public health authorities have reported drastic increases (4)........ the number of cases here, with 231 new cases on Monday, bringing the total number to 900, with more than 11,600 people undergoing diagnostic testing. 9 South Koreans infected with the virus, called COVID-19, have died. The (5) ...........of 51 million people now has the highest number of coronavirus cases outside mainland China

Sự kiện nào tác động đến sự thay đổi cục diện diễn biến cuộc chiến tranh thế giới thứ nhất

Trong nước bọt có enzim amilaza để tiêu hóa lipit đúng hay sai? Vì sao?

Nêu các bệnh ở:

- Khoang miệng

- Dạ dày

- Ruột non, ruột già

- Thực quản

và nêu nguyên nhân

There are 11 mistakes in the following paragraph. Under;ine the mistake then correct it. Write your answer in the table below.
Do you have (0) some close friends? I think everybody has at least one close friend in his life. And so do I. I has two close friends: Linh and Chi. We are in the same class at the prinmary factory and the secondary school. We are also neighbor so we spend most of their time studying and playing together. Chi is a beauty girl with big black eyes and an oval rosy face. She is an intelligent student and always studies the better in my class. She also likes read. Linh isn't as beautiful as Chi and she has a lovely smile and looks very healthy. Linh is very sporty. She spends most of her free time playing sports. Linh is a volleyball star on our school team. She is very sociable and has a good sense of humorous. Her jokes always make us laugh. I love both of my friends and I always hope our friendly will never die.

1/ Mrs Reed (turn) _________ on the radio in her car while she (drive) _________ home yesterday. She (listen) ___________ to some music when she suddenly (hear) ___________ a siren. She (look) ____________ in her mirror and (see) _________ an ambulance behind her. She immediately (pull) ________ her car to the side of the road and (wait) _________ for the ambulance (pass) _________.

2/ My mother (call) ___________ me around 5 o’clock. My husband (come) _________ home a little after that. When he (come) __________ home, I (talk) ___________ to my mother on the phone.

3/ Next month I (have) _________ a week’s vacation. I (plan) _________ to take a trip. First I (go) _________ to Madison, Wisconsin to visit my brother. After I (leave) ________ Madion, I (go) _________ Chicago to see a friend who (study) _________ at a university there. She (live) _________ in Chicago for three years, so she (know) _________ her way around the city. She (promise) _________ to take me to many interesting places. I (never, be) _________ in Chicago, so I (look) _________ forward to going there.

4/ Yesterday John (eat) _____________ breakfast at 8:00. He (already, eat) _________ breakfast when he (leave) ____________ for class at 8:45. He (always, eat) _________ breakfast before he (go) _____________ to class. I (usually, not eat) _________ breakfast before I (go) _________ to class. But I (usually, get) _________ hungry about midmorning. Tomorrow before I (go) _____________ to class, I (eat) _________ breakfast.

5/ Last year, I (go) __________ mountain climbing for the first time. It was exciting and terrifying at the same time. We (move) ___________slowly and carefully, and it (take) ___________ three days to get to the top. When we climbed onto the summit, we (find) ___________ another group of climbers. They (arrive) ___________ several hours ahead of us. They (have) ___________ dinner and listening to Beethoven. We (laugh) __________ and they (invite) ___________ us to join them. The climb (be) ___________, to say the least, an unforgettable experience.

6/ The weather (be) ___________ terrible lately. It (rain) ___________ off and on for two days, and the temperature (drop) ___________ at least twenty degrees. It (be) ___________ in the low 40s right now. Just three days ago, the sun (shine) ___________ and the weather was pleasant. The weather certainly (change) ___________ quickly here. I never know what to expect. Who knows ? When I (wake) ___________ up tomorrow morning, maybe it (snow) ___________.

7/ A taxi driver (drive) ____________ along a street when he suddenly (black out) ___________ and lost control of his vehicle. The taxi (plunge) _________ into a nearby river. A hawker, who (see) ______________ the accident, rushed from his coffee stall and (dive) ___________ into the water. He (have) ___________ to swim twenty five metres before he could get to the taxi. The taxi driver (try) ______________ to wind down the window. The hawker reached into the taxi for the safety-belt. After he (release) __________ the safety-belt, he pulled the driver out through the partially open window. At the hospital, the driver (say) ____________ that the black out might (cause) ______________ by his high blood pressure condition.

8/ Marie Curie, the Polish-born chemist, was a courageous and determined woman. She (leave) ___________ her home for Paris to pursue her interest in science. Living in poverty, she still (manage) ___________ to graduate at the top of her class. She (meet) ___________ Pierre Curie shortly after graduation and (marry) ___________ him a year later.
Together, Pierre and Marie (form) ___________ the most famous husband-and-wife partnership in science history. They (discover) ___________ the radioactive elements, Polonium and Radium. They (award) ___________ the Nobel Prize for Physics in 1903.

Use the correct tense of the verbs in brackets.

1. Mrs.Reed (turn)______on the radio in her car while she (drive)_______home yesterday. She (listen)______to some music when she suddenly (hear)______a siren. She (Look)________in her mirror and (see)_______an ambulane behind her. She immediately (pull)______her car to the side of the road and (wait)______ for the ambulance (pass)_______.

Rút gọn biểu thức :

a, A = (x-2)³ - x( x² - x + 1) + 5x² + 8

b, B = (x + 3)³ - 9(x + 1)² - 9x + 1

Tìm x, biết:

a, 4x² + 4x + 1 = 25

b, x³ - 3x² + 3x - 2 = 0

c, 7x³ - 3x² - 3x - 1 = 0

Cho a-b = 2, ab= 3. Tính giá trị của biểu thức:

Q = a⁴ + b⁴

R = a⁶ + b⁶

Ai biết là bằng bao nhiêu không chỉ mình vs ạ!!!