Cho các chất sau:S,CaO,Na,P2O5,Al2o3,PbO,Fe,C2H4,Fe2O3,C,SO2,H2S,CuO,Fe3O4,Na2O,Al,NO,FeS.a)chất nào tác dụng với oxi ở nhiệt độ thích hợp?;b)chất nào tác dụng với H2 ở nhiệt độ thích hợp?;Viết phương trình phản ứng?

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giúp mk với Choose the best option to complete each of the following sentences. 1. They shouted and looked ________at me when I broke the vase. A. angry B. angrier C. angrily D. anger 2. He is tired, ________he stayed up late watching TV. A. so B. because C. but D. and 3. We are talking about the preservation of ________resources. A. natural B. naturally C. nature D. naturalize 4. Is he really ________that you can’t come there? A. disappoint B. disappointed C. disappointing D. to disappointing 5. It is our policy to ________forest and increase forestation. A. protect B. protecting C. to protect D. protected 6. I suggest ________to the movies. A. go B. to go C. going D. went 7. They made their living by ________fish in the ocean every day. A. catch B. catching C. to catch D. caught 8. I will be ________if she manages to sell that motorbike at a high price. A. surprise B. surprised C. suprising D. to surprise 9. If you know where she lives, please let me ________. A. know B. knew C. known D. to know 10. If you live in this small town, you ________earn much money. A. aren’t B. couldn’t C. can’t D. didn’t 11. Unless you understand, I ________explain it again to you. A. am B. was C. will D. would 12. If he ________a student, he will get a discount. A. is B. was C. were D. will be 13. Because plastic bags are very hard to ________, they will cause pollution. A. dissolve B. wrap C. tear D. collect 14. These materials can be ________into other packaging products. A. reused B. reduced C. removed D. recycled 15. If people ________public transport, there will be less pollution. A. use B. will use C. can use D. used 16. Minh’s English is excellent. He speaks ________. A. perfectly English B. English perfectly C. in perfect English D. English perfect 17. If you go ________doing that, you’ll end ________ in serious trouble. A. up/ with B. on/ up C. off/ with D. out/ up 18. Crops are sprayed with ________to kill insects. A. fertilizer B. manune C. dung D. pesticide 19. What about ________used paper, bottles, and cans every day? A. collect B. collecting C. to collect D. to collecting 20. If the sea water continue to be polluted, many fish species ________extinct. A. became B. will become C. would become D. become