Xe máy đi từ A đến B với vận tốc 30km/giờ lúc về đi với vận tốc 35km/giờ. Thời gian về ít hơn thời gian đi là 20 phút. Tính quãng đường

là học sinh em cần phải làm gì để góp phần bảo vệ tính đa dạng của thực vật bảo vệ môi trường,nơi ở trường học

III. Circle the best option to complete each sentence: 1. She usually _____ two hours a day a. work b. is working c. works d. working 2. Don’t make noise. My mother _________ with her friends a. is talking b. was talking c. talks d. talked 3. Listen! They _________ about the exhibition . Let’s join them a. talk b. talked c. are talking d. have talked 4. Where _____ your sister born? a. were b. was c. did d. is 5. We _____ have white wine, but we _____ red wine a. didn’t/had b. don’t/had c. did/didn’t d. didn’t/have 6. When did you _________ see him? a. recently b. already c. last d. lately 7. I _________ a bath when the phone rang a. was having b. had c. am having d. have 8. I _____ her two week ago a. seen b. was seeing c. saw d. have seen 9. I _____ to his house in 1991 a. moved b. have been moving c. have moved d. was moving 10. He came into the room while they _________ television a. have watched b. watched c. were watching d. have been watching 11. I fell asleep when I _____ television a. am watching b. am being watched c. was watching d. All are correct 12. They _____________ last week a. didn’t come b. came not c. don’t come d. did come 13. Where are Geoff and Anne? _____________ in the garden a. They’re sitting b. They sitting c. There sitting d. They’re siting 14. It’s very cold today and _____ a. It’s snowing b. it snows c. its snowing d. it snowing 15. She goes to the library twice a week. She _____________ read books there a. never b. usually c. rarely d. once 16. At nine o’clock yesterday morning, we _____________ for the bus a. are waiting b. waited c. were waiting d. was waiting 17. Tom _________ his hand when he was cooking the dinner a. burnt b. was burning c. has burnt d. had burnt 18. He _________ me every Sunday, and we often go fishing together a. came to see b. comes to see c. will be coming to seed. All answer are correct 19. The phone rang while she _________ dinner a. cooks b. was cooking c. is cooking d. has cooked 20. My sister _________ trouble with her motobike now, so she has to take the bus to work a. have b. is having c. was having d. had 21. When my mum got home, _________ a. the dinner be cooked b. I was cooking dinner c. I am cooking dinner d. the dinner deing cooked 22. Emma and Katie usually _________ their grandmother at weekends a. have visited b. visits c. visit d. are visiting 23. Peter was reading a book by Mark Twain _________ his friends came a. while b. when c. during d. if 24. Look! That boy _________ an elephant over there a. fed b. was feeding c. feeds d. is feeding 25. He _________ in London at the moment a. studies b. has studied c. is studying d. will study

Mong anh chị Mod thiên tài giải dùm em :-( nhờ anh Quangcuong347 giải giúp em nhé !

Dưới tác dụng của lực f vật chuyển dời một đoạn s theo hướng của lực thì công do lực sinh ra là

cơ delta nằm ở bộ phận nào trên cơ thể người

Sau khi học xong bài 63(sinh 8) các em cần làm j để ko mang thai ngoài ý muốn ở tuổi vị thành niên

Nêu phương pháp điều chế khí hidro trong phòng thí nghiệm; viết phương trình phản ứng minh họa

Cho 12g axit axetic tác dụng với 13,8g rượu etylic thu được 14,08g etyl axetat tính hiệu suất của phản ứng trên.... Mong mọi người giúp đỡ em ạ huhu

cho 4,8 gam Mg vào dung dịch HCl 0,5M a,tính thể tích của dung dịch HCl đã phản ứng b,tính thể tích khí sinh ra ở đktc c,tính khối lượng muối (MgCl2) tạo thành