I. Complete each of the sentences with one suitable words.

1. Every milk bottles can be ....reuse..... thirty times.

2. These materials can be ....recycled.... into other packaging products.

3. We should use tree leaves to ........wrap..... things.

4. We should do more to .....protect....... the enviroment and ...preserve........ natural resources.

5. Reduce means not buying products which are ........overpackaged.....

6. We shouldn't ........throw...... things away.

7. Farmers often use dung for .....fertilizing........... their fields.

8. The milk man btings bottles of milk to houses and .....collects............. the empty ones.

 -x² + 2x - 3

=-x²+2x-1-2

=-(x²-2x+1)-2

=-(x-1)²-2\(\ge\)-2 (vì -(x-1)²\(\le\)0)

Dấu"=" xảy ra khi: x-1=0 <=> x=1

Vậy GTLN của -x²+2x-3 là -2 tại x=1

As a senior high school student, I am very busy with my studies. Although I am very fond of watching television, I can only spend an hour after dinner on my hobby. Of all the TV programs, I like the news and documentaries best.

The news programs shown on all TV channels at 7:00 p.m. help me to know almost everything about different places in our country and important events happening all over the world. Through these programs, I can also know about the main national and international sportingevents.

The documentary programs at weekends are my favorites. By watching them, I can learn a great deal about human civilizations, the wonders of nature and the amazing inventions and discoveries of great people in the world.

Watching television is my hobby. I cannot imagine a day in my life without watching it.

Dùng từ gợi ý để hoàn thành các câu sau:

1. How much is a fried rice?

Điện tử còn thiếu vào chỗ trống:

I have a close friend. Her name is Mai. SHe is eleven yars old and she is in.....grade.........six. She.....can...speak English. She has English.....on....Tuesdat, Thursday and Friday. She can also..........play.....the piano.In her room,......there.......is a piano and some books. Every day she gets up at six. SHe.....has......breakfast and she goes to school at a...................to seven.

you/for/like/teenagers/don't/programs

You don't like program for teenagers.

Chọn từ khác loại:

1. A.bed B.window C.table D.chair

Dùng từ gợi ý viết thành câu hoàn chỉnh:

Does my father visit Ha Noi this summer vacation?

(Cái này có thể chia nhiều thì)

Các bạn giải cụ thể và vẻ hình giúp mình nhé . Cảm ơn các bạn nhiều !