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dasdragon
2 năm trước
cho A=n.(n-1).(n+1).(n^2+1). Với n là số nguyên . a, CMR:A chia hết cho 10 b. CMR:chữ số tận cùng của các số tự nhiên n và n^5 là như nhau
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UNIT 6: THE ENVIRONMENT TEST 1: I / Choose A, B, C or D to complete the following sentences 1. This newspaper is _____ everyday. It’s a daily newspaper A. publishing B. published C. to publish D. publish 2. He shouted and looked _____ at me when I broke the vase A. angry B. angrily C. angrier D. anger 3. He is tired _____ he stayed up late watching TV A. so B. because C. but D. and 4. We are talking about the preservation of _____ resources A. natural B. naturally C. nature D. naturalize 5. Is he really _____ that you can’t come there? A. disappoint B. disappointed C. disappointing D. to disappoint 6. I think most children are creative enough to write _____ poems A. protect B. protecting C. to protect D. protected 7. It is our policy to _____ forests and increase forestation A. prevent B. preventing C. to prevent D. prevented 8. Can you tell me who _____ this kind of machine? A. invented B. invention C. inventor D. inventive 9. The next stage in the development of television is _____ TV A. interact B. interaction C. interactive D. interactively 10. Remote controls are used to ____ with TV A. interact B. interaction C. interactive D. interactively II / Complete each sentence with a word from the list consuming – magazines – benefit – website – channels available – the Internet – criers – computer - information 1. Kien Thuc Ngay Nay is one of the most popular ___________ 2. Nobody can deny the __________ of the Internet in our life 3. The Internet is __________ in our city, so you can easily get access to it 4. __________ has developed and become part of our daily life 5. I think that watching TV is time __________ 6. We can see many international programs on different __________ 7. The Internet is a very fast to get __________ 8. I don’t like playing _________ games 9. I don’t know which __________ is useful for me 10. The businessmen of ancient Egypt hired ____ to shout about the things they wanted to sell III / Complete each sentence with the correct form of the verbs in the box look – make – write – say – meet – play – smoke – come – swim - see 1. Could you please stop _________ so much noise 2. She enjoys _________ letters 3. Why do you keep on __________ at me like that? 4. __________ is unhealthy, but a lot of people find it difficult to stop 5. We’re looking forward to _________ you 6. __________ every day is a good way of keeping fit 7. I’m tired of _________ to the same place every week 8. She left without _________ goodbye 9. Do you enjoy __________ people from other countries?

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