Giúp với!!!!!!!!! 1: Cho Na2O, CaO, H2O. Viết phương trình HH điều chế các dung dịch Bazo 2: Nhận biết P2O5 vào CaO chỉ với nước và quỳ tím, ko dùng thêm chất khác. 3: Ghi phương trình nhiệt phân Bazo ko tan

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Homework Exercise 1: Mỗi câu sau chứa một lỗi sai. Tìm và sửa chúng. 1. I haven’t cutted my hair since last June. ………………………………………….. 2. She has not working as a teacher for almost 5 years. ………………………………………….. 3. The lesson haven’t started yet. ………………………………………….. 4. Has the cat eat yet? ………………………………………….. 5. I am worried that I hasn’t still finished my homework yet. ………………………………………….. 6. I have just decided to start working next week. ………………………………………….. 7. He has been at his computer since seven hours. ………………………………………….. 8. She hasn’t received any good news since a long time. ………………………………………….. 9.My father hasn’t played any sport for last year. ………………………………………….. 10. I’d better have a shower. I hasn’t hadone since Thursday. ………………………………………….. Exercise 2: Chia các động từ sau ở thì phù hợp. (Sử dụng thì hiện tại tiếp diễn và hiện tại hoàn thành) 1. My father (not/ play)……….. any sport since last year. 2. Some people (attend).............the meeting right now. 3. I’d better have a shower. I (not/have)……………………one since Thursday. 4. I don’t live with my family now and we (not/see)……………………each other for five years. 5. Where is your mother? She...........................(have) dinner in the kitchen. 6. Why are all these people here? What (happen)................................? 7. I………………….just (realize)…………... that there are only four weeks to the end of term. 8. She (finish) ... reading two books this week. 9. At present, he (compose)........................a piece of music. 10. We (have)........................dinner in a restaurant right now. Exercise 3: Viết lại những câu sau sao cho nghĩa không đổi. 1. She started to live in Hanoi 2 years ago. (for) -> ………………………………………………… 2. He began to study English when he was young. (since) -> ………………………………………………… 3. I have never eaten this kind of food before. (This is) -> ………………………………………… 4. I have never seen such a beautiful girl before. (She is) -> ………………………………………… 5. This is the best novel I have ever read. (before) -> ………………………………………… Exercise 4: Viết lại các câu sau dựa trên các từ cho sẵn có sử dụng thì hiện tại hoàn thành. 1. We/ not eat/ out/ since/ mom’s birthday. ………………………………………….. 2. How/ long/ you/ live/ here? ………………………………………….. 3. You/ ever/ been/ Russia? ………………………………………….. 4. She/ not/ meet/ kids/ since Christmas. ………………………………………….. 5. They/ repair/ lamps/ yet? …………………………………………..