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1. If you burn rubbish, it will produce harmful smoke.
2. If we reuse these bottle, we will save a lot of money.
3. Trùng câu 2
4. If we plant trees in the schoolyard, the school will be greener place.
5. If we have a rubbish bin in every class, the classroom will be cleaner.
Well, now, I will describe the health problem that I had. Last week, my school had a camping day. All of the students and teachers in my school can join this outdoor activity. It was a very happy day for me to play with my friends. But after that day, I had a sore throat and flu because I talked too much and I was under the sun without a hat. I would say that it was so terrible. I feel tired and weak. I can’t do anything during that time. However, my mother gives me some tips to feel better. I didn’t drink cold water, I washed my mouth by saltwater. Especially, I have to take a lot of medicines. It’s very…horrible. Nevertheless, thanks to the medicines, I feel better now. I feel very healthy and I can do a lot of things again.
nửa chu vi hình chữ nhật là: 134 : 2 = 67 (m)
chiều rộng hình chữ nhật là: ( 67 - 11 ) : 2 = 28 (m)
chiều dài hình chữ nhật là: 28 + 11 = 39 (m)
diện tích hình chữ nhật là: 39 x 28 = 1092 (m2)