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DT
Đỗ Thanh Hải
CTVVIP
6 tháng 4 2021
1 If I were you I would recycle these plastic carrier bags
2 The pilots suddenly struck, so all flights had to be cancelled
3 The polluted environment causes the death of birds and plants
4 The contaminated food leads to people's poor health
GC
4
6 tháng 5 2021
In this paper, I would like to discuss about the advantages and disadvantages of the internet. In the first place, the internet benefits us in many ways. It provides us with much information from every corner of the world. It helps us to know about what is happening on the earth and updates us with the most recent news. Also, the internet helps us to widen our social network with many friend in every country in the world. Through some programs such as Skype, facebook, Yahoo Messenger, etc, we have chance to make friend and talk to a variety of people. Moreover, it entertains us. Sometimes we can spend times listening to music or watching films on some websites. However, the internet also causes us many problems. The first one is to our health. Some people spend too much time searching and playing on the internet, which is not good for their brains and eyes. Next, it also prevents us from some activities such as reading books or going our with our friends. In addition, some programmes on the internet contain some bad content such as violence or sex which are not good for young people's mental lifem.
In short, everything has its two sides, so does Internet. Therefore, it is necessary that we use it for right purposes.
DT
Đỗ Thanh Hải
CTVVIP
7 tháng 5 2021
1 B
2 C
3 B
4 B
5 A
6 B
7 A
8 B
9 B
10 D
11 A
12 B
13 C
14 D
15 A
16 B
II
1 It is in China
2 It was built from 246-209 BC
3 It was made of brick and earth
4 Yes, it is
TK
3
5 tháng 8 2021
a,\(3xy+6x^2=3x\left(y+2x\right)\)
b,\(-4xy^2+8x^2y=-4xy\left(y-2x\right)\)
c,\(4\left(x+y\right)+x^2+xy=4\left(x+y\right)+x\left(x+y\right)\)\(=\left(4+x\right)\left(x+y\right)\)
5 tháng 8 2021
d,\(4x^2-9y^2=\left(2x\right)^2-\left(3y\right)^2=\left(2x-3y\right)\left(2x+3y\right)\)
e,\(25x^2-\dfrac{1}{4}=\left(5x\right)^2-\left(\dfrac{1}{2}\right)^2=\left(5x-\dfrac{1}{2}\right)\left(5x+\dfrac{1}{2}\right)\)
MN
23 tháng 10 2021
5. Keeping the house clean and tidy is for you
6. It's very wonderful to travel around the world
7. It took her 2 days to make this dress
8. He is fonds of playing football in his free time
9. Susan is more intelligent than Mary
10. Mary is the tallest student in this class
PT
11 tháng 5 2021
Currently, the development of COVID-19 is very complicated, so students are away from school and living at home to prevent infection. We often spend a lot of time together during the school year, so it is imperative that wash your hands often, especially before eating, after blowing your nose, and after using the toilet. And more importantly, we should wear a mask when recommended by the school and authorities and should be worn properly. We have to make a correct minimum distance of 1.5 m with people. Airborne respiratory viruses exist in saliva droplets when someone sneezes or coughs. So cover your nose and mouth when you sneeze or cough with a tissue or cough and sneeze into your elbow. We love to share utensils, favorite toys and cups with friends, but do not share eating utensils with friends, especially during flu season and other respiratory illnesses. It is important to comply in order to best prevent the Covid-19 epidemic.
1 is studying
2 are studying
3 are taking
4 go
5 live
6 learn