Có hai lọ đựng hai chất khí không màu: khí oxi Oz, khí cacbonic CO,. Bằng phương
pháp hóa học hãy nhận biết hai chất khí trên. Viết phương trình phản ứng minh họa.

Lập phương trình hóa học biểu diễn phản ứng hóa hợp của lưu huỳnh với các kim
loại magie Mg, kẽm Zn, sắt Fe, nhôm Al, biết rằng công thức hóa học các hợp chất được
tạo thành kà MgS, ZnS, FeS, AlzS3.

I) passive voice 

the students will finish the exercise soon

---> 

III. Put the following words or phrases in the correct order to make correct sentences
1. to give the victim/They/when / some tea / advise us / she revises
2. cold water packs/ We should / the pain / with ice / or / ease
3. the window / I always keep/open/ in order to / fresh air in / let a notice on the board / Mary wrote / to inform / about the changes / her classmates / in schedule
5. can you/What type / put in / of / the compost? / garbage
6. like Friends of the Earth / We should / an organization/more information/contact/ for
7. that you passed / your English examination / Your grandfather / very delighted / and I / are
8. write soon / date and time / and confirm / We should / your arrival
9. in/Mankind / on the moon / might / the future / live
10. mosquitoes away/dry tea leaves/ In some areas / burn/ to keep/people

6. I was very delighted to pass the final exams.
---> I was very delighted that.........
7. We are very happy to have a trip to Hue this weekend.
→ We are very happy that..........
8. My friend was very sorry to break my bike yesterday.
→ My friend was very sorry that...........
9. She is learning English hard because she wants to study abroad.
→ She is learning English hard so..........
10. The last time she met her parents was three weeks ago.
→ She's.............

IV. Choose the word or phrase that best fits the blank space in the passage.
Formerly, industrial goods 1. (made / are made / were made / making) to last forever. A car or a
cooker was used for a very long time. Nowadays, 2. (but / though / however / then), industry has
persuaded us that its 3. (produce/producing/products/production) can only last a very short time.
It's 4. (cheap / cheaper / the cheapest / as cheap) to throw them away than to repair them. This has
led directly to the 'throw-away society", and to the waste of the earth's resources. Just think of the
cars that are traded in daily simply because they are out-of- fashion". Just think of the expensive
packaging material that 5. (are /is/have/has) thrown away each time a new object is bought. Why
ren't they recycled to prevent extreme 6. (waste / lost / spending / loss) of resources?

13. Milk bottles can be (recycled / thrown away / broken / reused) after being cleaned.
14. The following instructions are for (reusing / recycling / reworking/repaying) old newspapers.
15. We can reuse the plastic bottles after they are washed (with/by/in/on) water.
16. Drink cans are brought back to the factory (for/to/ in / of) recycling.
17. We need to do something to prevent people (from/away/ off/ for) cutting trees.
18. (In/On/From / With) industry, most glass is recycled.
19.People throw .......... billions of cans every year all......... the world ( away-over / away-in / out-over/ off-in)
20. there must be a deposit ( on / in / of / with ) all drink cans

1. "Romeo and Juliet" (is written/ wrote / was written /written) by Shakespeare.
2. Those toys were (make / made / making / to make) of wood.
3. I am excited (to join/join/joining/joined) in the trip around the Capital.
4. People recycle used things (save / to save / saving/ for save) the natural resources.
5. It's hard (believe / to believe / believed/ believing) that mankind might live on the moon.
6.A new stadium (will build / will be building / will be built / is built) next year.
7. It's too cold outside. (Would you like to shut the windows / Will you shut the windows, please /
Shall I shut the windows / Can I shut the windows)? - Sure. I'll do it right now.
8. Milk (will be brought / is bring / is brought / has been brought) to the houses by the milkman
every day.
9. Arabic (speaks / is speaking / speaking / is spoken) by the people of Syria and Iraq.
10. Should we go out tonight? - I'm afraid not. It's (easy for / hard to / easy to / will be easy to)
catch a cold.
11. One ton of (recycling / recycled / recycle / to recycle) paper saves approximately eight trees.
12. Those vases were made from (using /use/used/ to use) glass.

V. Read the passage, then do as directed.
I'm in the hospital! I've broken my leg! But don't worry. I'll be all right. I've been here since last
Sunday. I had an accident at a football match. I tried to kick the ball but I kicked the goal post! The pain was quite bad, so Dad brought me to the hospital the same day. I had a small  operation three days ago. The nurses and doctors have been really nice, but the food's disgusting. I prefer Mom's cooking!
True or False
1.The writer's broken leg was taken to the clinic.................
2.The writer had a football accident last Sunday.................
3.The writer felt not much pain..................
4.The writer tried his best to kick the ball into the goal post.....................