CHUNG MINH:1/3<A=1/3^2+1/4^2+1/5^2+....+1/100^2<1/2

IV . give the correct form or tense of verbs. 3. the researchers said that they ( work)......................hard( find).......a vaccine for the Ebola vius disease then. 4. the new technology rapidly ( introduce).................................. into teaching and learning languages so far. 5. Do you think snail email still (use)..................................in 2050?

trong những hành vi sau hành vi thể hiện theo tôn giáo? A. Xin quẻ thẻ đầu năm B. Đi tham quan chùa C. Thắp hương cúng tổ tiên D. Cắt tóc đi tu

vote 5 sao và cảm ơn làm nhanh và chính xác ạ

giúp e câu 1 đc thì câu 2 luôn em cám ơn đang cần gấp nên làm nhanh giúp em ạ

Câu 1. Vẽ sơ đồ nguyên lí và sơ đồ lắp đặt mạch điện hai công tắc ba cực điều khiển một đèn ? Câu 2. Mạch điện 2 công tắc ba cực điều khiển một đèn được sử dụng ở vị trí nào trong nhà?

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18. We should give unused clothes to_____________to help the people in need. A. charity B. factory C. market D. hospital 19. My head hurts. I need to take a ………. A. sun cream B. backpack C. walking boots D. painkiller 20. She is always____________ at school. She spends most of the time studying A. hard-working B. careful C. lazy D. funny 21. “I’ve just received a scholarship”- “__________”. A. Well B. Thank you C. Really D. Congratulations 22. A hi-tech robot will help us __________ children while we are away. A. look after B. look in C. look at D. look out 23. I didn’t go to school yesterday ___________ I was ill A. although B. so C. because D. but 24. If we ________cutting down the trees, we can’t prevent floods and other natural disasters A. don’t stop B. stop C. won’t stop D. will stop

12. We should use _____________pens and pencils to reduce rubbish. A. reliable B. reusable C. refillable D. sociable 13. In the future, we will have ___________to do housework. A. robots B. wireless TV C. smart phone D, hi-tech fridge 14. Eiffel Tower is the most attractive ____________in France. A. building B. resor C. square D, landmark 15. We should use _________to save natural resources. A. oil B. solar energy C. coal D. gas 16._______________ means creating new products from used materials. A. Reduce B. Reuse C. Recycle D. Rebuild 17 If the ______________ is polluted, we won’t have enough food to eat. A. water B. air C. noise D. soil

6. That is - ________ book I’ve ever read. A. the borest B. the boring C. the most boring D. the most bored 7. I’ ve never seen a- ________ bridge than this one. A. longest B. longer C. most longest D. more longer 8. That dog isn’t _______it looks. A. more dangerous than B. as dangerous as C. dangerous than D. dangerouser than 9. In the future, we won’t go on holiday to the beach but we - ______ go on holiday to the moon. A. must B. can’t C. might D. won’t 10. - ________ you swim when you were ten? A. Can B. Could C. Will D. Might 11. My father likes watching TV____________ he doesn’t like listening to music. A. and B. so C. but D. because