Hãy nêu các lí do chính để trả lời câu hỏi: Vì sao sự gia tăng dân số có tầm quan trọng hết sức to lớn đối với tương lai nhân loại, nhất là đối với các dân tộc còn nghèo nàn, lạc hậu?

Câu lệnh Rewrite(<biến tệp>) ; có ý nghĩa gì?

A. Thủ tục gắn tên tệp cho tên biến tệp

B. Khai báo biến tệp

C. Thủ tục đóng tệp

D. Thủ tục mở tên để ghi dữ liệu

Câu lệnh để gắn tên tệp ‘bai1.txt’, cho biến tệp f là:

A. assign(bai1.txt, f);

B. assign( f, bai1.txt);

C. assign(‘bai1.txt’, f);

D. assign( f, ‘bai1.txt’);

Read the passages below and choose the best tittle for each passage?

5.__________ So here is some advice. Keep your webpage private. (only friends can see a private homepage). Do not put photos of yourself on your homepage. Do not meet people that you only know because of the website. And finally, remember that online friends are fun, but they are not the same as real friends.

SUGGESTED TITTLES:

Tittle 1 – Why do “friends” websites seem dangerous?

Tittle 2 – How do “friends” websites work?

Tittle 3 - What’s the best advice for people who want to use “friends” websites?

Tittle 4 – Where do Millie’s friends live?

Tittle 5 – How can I find “friends” websites?

Tittle 6 – Why are “friends” websites popular?

Question 5:

A. Tittle 6

B. Tittle 1

C. Tittle 3

D. Tittle 4

Read the passage carefully then answer the questions.

The environment is the most important thing for our life. The environment is the air we breathe, the water we drink and is everything we need for our life. This pollution affects the health of living things.

But only we can change it and solve it. First, we can use recycled paper to help save trees. Second try to avoid buying plastic. To protect the environment we also have to save energy.

Finally, we now know that environment is the most important thing for life. Everyday we invent and find more and more way to protect the environment. I hope that in the future the earth will be cleaner.

Questions

What do we try to avoid buying?

______________________________________________________________

Read the passage carefully then answer the questions.

The environment is the most important thing for our life. The environment is the air we breathe, the water we drink and is everything we need for our life. This pollution affects the health of living things.

But only we can change it and solve it. First, we can use recycled paper to help save trees. Second try to avoid buying plastic. To protect the environment we also have to save energy.

Finally, we now know that environment is the most important thing for life. Everyday we invent and find more and more way to protect the environment. I hope that in the future the earth will be cleaner.

Questions

Is the environment the most important thing for our life?

______________________________________________________________

Cho tam giác vuông có một góc 60o và cạnh huyền có độ dài là 8. Hãy tìm độ dài của cạnh đối diện với góc 60o.

Cho tam giác ABC vuông tại A. Biết cosB = 0,8, hãy tính các tỉ số lượng giác của góc C.

Gợi ý: Sử dụng bài tập 14.

Use the correct form of the verbs in brackets.

I _________ just ____________ (buy) a ticket. I'm going to the movie at 8 o’clock this evening.

If you want to live long, you ______ eat more vegetable and fruit.

A. should

B. shouldn’t

C. had to

D. needn’t