Mọi người giúp em giải chi tiết với ạ nếu ai trả lời trước ngày 22/4/2020thì em sẽ chọn câu trả lời hay nhất ạ

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1. We want to share our recycling story with our________. * 1 điểm A.reading B.reader C.readers D.read 2. Air is a ______ of gases. * 1 điểm A.mix B.mixing C.mixture D.mixed 3. This is our new ________. Please try it! * 1 điểm A.production B.produces C.producing D.product 4. We are _______ that you are interested in protecting the environment. * 1 điểm A.delight B.delighted C.delighting D.delights 5. Mix them with certain specific ________. * 1 điểm A.chemistry B.chemicals C.chemist D.chemist's 6. Contact an organization _______ Friends of the Earth ______ more information. * 1 điểm A.in / on B.for / on C.of / for D.like / for 7. Don’t throw things ______. Try and find another use ______ them. * 1 điểm A.away / for B.away / in C.off / on D.off / for 8. We can look ____ information ______ recycling things in the local library. * 1 điểm A.after / for B.for / on C.up / in D,into / for 9. Milk ______ to houses by the milkman every day. * 1 điểm A.brings B.is bring C.is brought D,has brought 10. We were delighted _____ your letter last week. * 1 điểm A.getting B.to get C.get D.got 11. Milk bottles can be ______ after being cleaned. * 1 điểm A.recycled B.thrown away C.broken D.reused 12. One ton of recycled paper ______ approximately eight trees. * 1 điểm A.saves B.save C.is saving D.are saving 13. This project _____ next month. * 1 điểm A.are carried out B.carries out C.will carry out D.will be carried out 14. It’s dangerous ______ in that river. * 1 điểm A.swim B.to swim C.swimming D.swam 15. We are looking forward to _____ you in June. * 1 điểm A.seeing B.see C.saw D.be seen 16. Glass is broken up, melted and made ______ new glassware. * 1 điểm A.in B.into C.to D.from 17. I think we should use tree leaves such as banana leaves, lotus leaves, etc. ______ things. * 1 điểm A.to wrap B.to soak C.to recycle D.to protect 18. Clothes belong to ____ group. We can recycle them and make them into paper or shopping bags. * 1 điểm A.compost B.fabric C.junk D,vegetable matter 19. Melt the mixture ______ it becomes a liquid. * 1 điểm A.until B.when C.after D.before 20. My sister likes sweets ______ from chocolate. * 1 điểm A.make C.to make B.made D.making

EX4. Viết các câu sau ở thể khẳng định (+), thể phủ định (-), thể nghi vấn (?) ở thì hiện tại hoàn thành. (do at home ) 1. (+) I have finished my homework. (-) ________________________________________________________________. (?) ________________________________________________________________? 2. (+) ________________________________________________________________. (-) My uncle hasn’t been to Singapore before. (?) ________________________________________________________________? 3. (+) ________________________________________________________________. (-) ________________________________________________________________. (?) Have they found their keys? 4. (+) Jim has just played video games with his brother. (-) ________________________________________________________________. (?) ________________________________________________________________? 5. (+) ________________________________________________________________. (-) My grandmother hasn’t visited me since November. (?) ________________________________________________________________? 6. (+) ________________________________________________________________. (-) ________________________________________________________________. (?) Has your sister studied Medicine for 2 years? 7. (+) It has been long since our last encounter. (-) ________________________________________________________________. (?) ________________________________________________________________? 8. (+) ________________________________________________________________. (-) We haven’t graduated yet. (?) ________________________________________________________________? Các bạn giúp mik với ạ,đề bài dài thôi chứ thật ra có 1 bài thôi à