Biết a+b+c=0. Tính A=[ab(a-b)+bc(b-c)+ca(c-a)]. [1/ab(a-b) + 1/bc(b-c) + 1/ca(c-a) ] Các bạn làm giúp mình vs

Giúp mình 2 câu này với ạ Mình cảm ơn nhiều❤

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Chọn đáp án đúng và giải thích: 1, Your hair is so long. you'd better have it___ tomorrow morning A, cut. B, to be cut. C, to be done. D, to cut 2,You have to pass the examination__ you want to attend the course A, if. B, or. C in order to. D, so 3,By learning English, you can get access ___ the world's development A, with. B, into. C, to D, for

I. Give the correct form of the word 1. Due to the pilot's _____________, the copilot managed to land safely. (guide) 2. She is always ___________________towards her parents. (respect) Giải thích giúp được không ạ?

VI. Read the following passage and choose the best answer for each gap: I have a sister, she doesn’t usually have breakfast. She only has a…(1)…of coffee. She doesn’t eat ….(2)…. until about half past eleven o’clock. Then she has a chocolate and a glass of milk for lunch she usually has a salad. That’s …(3)…about two o’clock. She has dinner at a quarter past six in the afternoon. She’s a vegetarian, so she doesn’t eat ..(4)…or fish. She eats cheese and things like that. She has a glass of water or fruit juice with her meal. At the weekend she goes to a restaurant in the evening. We can …(5)…vegetarian meals in many restaurants now. 1. A. bar B. cup C. bowl D. packet 2. A. some B. any C. something D. anything 3. A. for B. on C. at D. in 4. A. meat B. noodles C. vegetables D. rice 5. A. buying B. buys C. getting D. get

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IV- Give the correct form of words to make the complete sentences: 1. There are four .....................................................in my house. (bookshelf) 2. We must be .............................................. when we cross the road. (care) 3. Lee is from Australia. She is ........................................................ (Australia) 4. There are a lot of …… ………………………….in this river. (FISH) 5. Nobody in my class is.....…… …..…………...at Math than Thuy (Good) 6. Some.....………..…………...are talking to each other. (MAN) 7. There are ten .....…… …..…………...in his family. (PERSON) 8. There are many ……….in the summer. (Act)

Em đã từng có lúc ốm đau đc mẹ dỗ dành,chăm sóc.Hãy viết bài văn tả lại mẹ em khi đó và nói lên tình cảm của em đối với mẹ (mik cần gấp)