Question 1:
There are 40 students in Mrs. Brown's class. 25% of her students received a B on the test. How many students received a B?

• a. 10
• b. 12
• c. 18
• d. 20
• dịch hộ nữa nhé
•  

Mi and Nick have decided to give a presentaion on water pollution to the class. Read what they have prepared and answer the questions. 

(Mi và Nick đã thảo luận đưa ra bài thuyết trình về ô nhiễm nước cho lớp. Đọc những gì họ đã chuẩn bị và trả lời câu hỏi.)

Water pollution is the contamination of bodies of water such as lakes, rivers, oceans, and groundwater (the water beneath the Earth’s surface). It is one of the most serious types of pollution.

Water pollution can have many different causes. Factories dump industrial waste into lakes and rivers. Sewage from households is another cause. Farms using pesticides to kill insects and herbicides to kill weeds can also lead to water pollution. These factors cause ‘point source’ pollution while pollutants from storm water and the atmosphere result in ‘non-point source’ pollution.

Water pollution can have dramatic effects. In many poor nations, there are frequent outbreaks of cholera and other diseases because of people drinking untreated water. Humans can even die if they drink contaminated water. Polluted water also causes the death of aquatic animals such as fish, crabs, or birds. Other animals eat these dead animals and may also get sick. In addition, herbicides in water can kill aquatic plants and cause further damage to the environment.

So what should we do to reduce water pollution?

1. What does the second paragraph tell you about?

(Đoạn văn thứ hai nói cho bạn biết điều gì?)

2. What does the third paragraph tell you about?

(Đoạn văn thứ ba nói cho bạn điều gì?)

3. What is groundwater?

(Nước ngầm là gì?)

4. What are point source pollutants?

(Những chất gây ô nhiễm nguồn là gì?)

5. What are non-point source pollutants?

(Những chất gây ô nhiễm không nguồn là gì?)

6. Why do people use pesticides?

(Tại sao người ta sử dụng thuốc trừ sâu?)

MN TRẢ LỜI GIÚP MIK NHA. KO LẤY TRÊN MẠNG TỰ LÀM GIÚP MIK