When you think of a language, you probably think of speaking and writing. There is (1) another kind of language - a sign one. It is called body language. People speak body language by the (2) they sit, stand look and walk, withoutsaying a word.
Some body language is the (3) all over the world. All people smile when they are happy and open their eyes wide when they are surprised. (4) body language is different in different countries.
For example, when native English speakers talk, they stand quite close. All a friend to stand near you, hold out your arms. If your fingers just touch the person's shoulder, you're at the (5) that English speakers find comfortable.

Viết lại câu giữ nguyên nghĩa :
1. What a pity ! It rains so often here. => I wish ........
2. " I will have a cup of tea with you next Monday ", she said. => She said that .................
3. We should clean our teeth twice a day. => Our teeth ..........
4. I will not hang these old pictures in the living room. => These old pictures ..............
5. The manager didn't phone the secretary this morning. => The secretary ..............
6. How many languages do they speak in Canada ?
7. Are you going to repair those shoes ? => Are shoes .................

Viết lại câu giữ nguyên nghĩa :
1. I last drank champagne at my brother's wedding. => I haven't ..............
2. They often put this question to me but I never answer it. => This question .............
3. The weather has turned all the leaves yellow. ( sử dụng câu bị động )
4. Who stole the money ? ( sử dụng câu bị động )
5. Why didn't they tell me about it before ? ( sử dụng câu bị động )
6. What books are people reading this year ? ( sử dụng câu bị động )

Tại sao khi thiết kế mạng điện lại phải lựa chọn dây dẫn theo thiết kế của mạng điện ?

Cho hàm số: y = (1-2m)x+m-2. Tìm m để :
a, Hàm số là hàm số bậc nhất
b, Hàm số đồng biến trên R
c, Đồ thị hàm số đi qua gốc tọa độ
d, Đồ thị hàm số cắt trục tung tại điểm có tung độ là 2
e, Đồ thị hàm số cắt trục hoành tại điểm có hoành độ là -1

Viết lại câu giữ nguyên nghĩa :
1. Minh last read that book when he was young/ last year/ five months ago. => Minh hasn't
2. The last time she phoned her parents was nearly three weeks ago/ in 2018. => She hasn't
3. This is the largest kite I've ever seen. => I've never
4. She hasn't seen a more lovely baby than him. => He is the
5. Do you have a better computer than this one ? => Is this
6. Mr. Binh started recycling rubbish two years ago. => Mr. Binh

In many secondary schools in Britain, (1) school uniform is compulsory. Some schools argue that there are many (2) to this system. Most students don't agree with school uniform.
Firstly, when you have to wear the same (3) as everyone else you don't have a chance to develop personal taste in the way you dress.
Secondly, people who lool scruffy (4) their uniforms, too and you can always tell the people who come from poor homes (5) thei uniforms are not new or don't fit properly.
Finally, the main reason (6) most students don't like school uniforms is because most schools choose such colors and (7) that don't suit young people at all.

Tìm lỗi sai và sửa lại :
1. Thank you for looking up the children while I was out.
2. I haven't saw my grandparents for a quarter of a year.
3. A new shop is open on Main Street nowaday.
4. Although they are very rich, but they aren't happy.
5. The picture was painting by Michael last year.
6. We have lived in this town with our family for 2000.
7. I didn't eat that kind of food since I left home.

Một gen có 150 vòng xoắn, số nuclêôtit loại A bằng 600.
a, Xác định tổng N, L, M, H.
b, Trên mạch 1 của gen có A=200, mạch 2 của gen có G=150. Xác định số nuclêôtit mỗi loại của ARN được tổng hợp từ mạch 1 của gen.
c, Gen trên nhân đôi 5 lần. Tính số lượng N môi trường cung cấp cho gen nhân đôi.

Rewrite the follow sentences using " whether or question words" before to-infinitives :
"Why can't you help me ?" she asked him. => She wanted to know .......................