Oh!Man
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


Đáp án : B
trong câu “He was right” chia quá khứ -> lời ước về hành động trong quá khứ -> khi lùi thì sẽ là thì QKHT

a, Để phương trình có nghiệm
=>\(b^2-4ac\ge0\)
<=>\(4+4m\ge0\)
<=>\(4m\ge-4\)
<=>\(m\ge-1\)
b, Để phương trình có 1 nghiệm duy nhất
=>\(b^2-4ac=0\)
<=>\(b^2=4ac\)
<=>4=-4m
<=>m=-1
c,Để phương trình có 2 nghiệm phân biệt
=>\(b^2-4ac>0\)
<=>\(4+4m>0\)
<=>4m>-4
<=>m>-1
<=>

EX9. Fill in each blank with a suitable word to complete the passage.
This is a story (1) ...about.......... Mark Twain, a famous American writer and homourist. We all know that Twain was famous in his day as a lecture and teller of funny stories. We also know that he (2) .....like......... to play jokes on his friends. In this case, the joke was on Mark Twain.
One day, he was walking along the streer of a small town where he was going to deliver a lecture that evening. (3) ....it........ was a young man who stopped him on his way just to (4) .......talk...... about his uncle. The young man said that his uncle (5).....never......... laughed and smiled. Mark Twain told the young man to take his (6) ...uncle..... to his lecture that evening, and he could guarantee to make the young man's uncle laugh.
That (7) .....evening........ the young man and his uncle sat in the (8) ..first.......... row. Mark Twain spoke directly at them. He told many funny stories, but the old man didn't smile smile. Then he told the (9).......funniest.... stories which he knew, but the old man'd face still remains blank. At ( 10 )....last......., Mark Twain left the platform feeling exhausted.
Later Mark Twain was talking to his friend about this. His friend laughed and said: " Oh, I know that old man. He has been as deaf as a post for years!!!''.

I. Nội qui tham gia "Giúp tôi giải toán"
1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;
2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.
3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.
Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.
I. Nội qui tham gia "Giúp tôi giải toán"
1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;
2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.
3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.
Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.

1. A. pull B. pulling C. pulled D. to pull
2. A. What B. How C. When D. Why
3. A. and B. but C. so D. or
4. A. and B. but C. although D. so
5. A. is B. are C. was D. were
6. A. but B. and C. so D. yet
7. A. why B. while C. although D. if
8. A. While B. Because C. Although D. If
9. A. Before B. After C. Because D. But
10. A. Here B. There C. She D. That

Read the text below then choose the right sentence A,B,C or D.
Baby
It was a beautiful spring day: the sun was shining, the sky was blue. In the centre of London a policeman cried. He saw a man with a big lion. They were walking down the street.
“Hey,you!” he said. “What are you doing here with this lion? You can’t walk around the streets with a lion. Take it to the Zoo !”
“OK, officer. I want to show Baby the town.”
The man opened the door of his car and the lion jumped in. The car went away.
The next day the police officer saw the same man and the same lion again.
“Hey, you!” he said.”Come over here! And bring that lion with you!”
The man took the lion to the police officer.
“What’s the problem, officer?”
“Problem? I told you yesterday to take the lion to the Zoo!”
“Oh, I did, officer, I took Baby to the Zoo. He enjoyed it very much. But today, I am taking him to the swimming pool !”
1. A- It wasn’t raining that day.
B- A policeman saw a man with a dog in the centre of New York.
C- The man and his pet were walking along the park.
D- The man didn’t have a car.
2. A- The lion couldn’t get into the car, the lion was too big.
B- The policeman took the lion to the Zoo and put the lion into the cage.
C- The man showed his pet the Zoo.
D- The policeman was happy to see a man with a lion in the centre of London.
3. A- The man had a baby. It was a nice girl of three.
B- Baby was the lion’s name.
C- The policeman told the man to show Baby the town.
D- The lion visited the London Zoo.
4. A- The man could drive a car.
B- The lion didn’t like the Zoo at all.
C- The policeman took the lion to the swimming pool.
D. The policeman met people with lions in London streets every day.
5. A- The lion was the man’s pet.
B- The man had a baby lion as a pet.
C- The policeman showed the park and the school to the lion.
D- When the policeman saw the man with the lion he got very hungry
1. A- It wasn’t raining that day.
B- A policeman saw a man with a dog in the centre of New York.
C- The man and his pet were walking along the park.
D- The man didn’t have a car.
2. A- The lion couldn’t get into the car, the lion was too big.
B- The policeman took the lion to the Zoo and put the lion into the cage.
C- The man showed his pet the Zoo.
D- The policeman was happy to see a man with a lion in the centre of London.
3. A- The man had a baby. It was a nice girl of three.
B- Baby was the lion’s name.
C- The policeman told the man to show Baby the town.
D- The lion visited the London Zoo.
4. A- The man could drive a car.
B- The lion didn’t like the Zoo at all.
C- The policeman took the lion to the swimming pool.
D. The policeman met people with lions in London streets every day.
5. A- The lion was the man’s pet.
B- The man had a baby lion as a pet.
C- The policeman showed the park and the school to the lion.
D- When the policeman saw the man with the lion he got very hungry.
☢
man cái gì