Everyone wants to reduce pollution. But pollution problem is as complicated as it is serious. It is complicated because much pollution is caused by things that benefit people. For example, exhaust from automobiles causes a large percentage of all air pollution. But automobiles provide transportation for millions of people. Factories discharge much of the material which pollutes the air and water, but factories give employment to a large number of people. Too much fertilizer or pesticide can ruin soil, but fertilizers and pesticide are important aids to the growing of crops. Thus, to end or reduce pollution immediately, people would have to stop using many things that benefit them. Most people do not want to do that, of course. But pollution can be gradually reduced in several ways.

Answer the questions:

What would people have to do if they want to reduce pollution?

Bảng biến thiên sau đây là của hàm số nào?

A. y = x 4 − 3 x 2 + 1  

B.  y = − x 4 + 3 x 2 + 1  

C.  y = − x 4 − 3 x 2 + 1  

D.  y = x 4 + 3 x 2 + 1

Rewrite the sentences so that the meaning does not change.

The teacher can't come to class today. He teaches us math.

→ The teacher who .......................................................................

Choose the word or phrase that best fits the blank space in the following passage.

Nowadays, more and more people are changing the …30…………….. why they use their television. When television was new, we use to turn …31…………….. and watch whatever there was. The fact that it was on TV was …32…………… for us to think it must be enjoyable. But not that it is part of every life. We choose the program we watch …33………….. more carefully. We remember that we have many other interesting things to do. As we watch …34……………… programs, we want to be sure that we will have a really good picture, with bright colors, and ……35…………. We are really interested, we want really clear sound. Of course, for higher ………36………, we have to pay more.

Question 35:

A. in spite of

B. Despite

C. Because

D. Because of

Đồ thị y = - x 4 + 2 x 2 có 3 điểm cực trị tạo thành một tam giác. Chu vi tam giác đó là

A.  2 + 2 2

B.  1 + 2

C.  2

D. 3

Sẵn sàng giúp đỡ cảm thông chia sẽ .

Biết tha thứ có lòng vị tha

Biết hì sinh quyền lợi của mình cho người khác

Dìu dắt ,nâng đỡ những người có lỗi lầm giúp họ tìm ra con đường đúng đắn