3.Nguyên liệu để sản xuất canxi oxit là đá vôi, thành phần chính của đá vôi là (5 Điểm) A. CaCO3. B. CaSO4. C. Ca(OH)2. D. Ca3(PO4)2. 4.Muối đồng (II) sunfat (CuSO4) có thể phản ứng với dãy chất: (10 Điểm) A. CO2, NaOH, H2SO4,Fe B. H2SO4, AgNO3, Ca(OH)2, Al C. NaOH, BaCl2, Fe, H2SO4 D. NaOH, BaCl2, Fe, Al 5.Cặp chất nào sau đây không thể tồn tại trong 1 dung dịch? (5 Điểm) A. NaOH, MgSO4 B. KCl, Na2SO4 C. CaCl2, NaNO3 D. ZnSO4, H2SO4 6.Muối tạo kết tủa trắng khi cho phản ứng với dung dịch H2SO4 là (5 Điểm) A. Cu(NO3)2. B. BaCl2. C. ZnCl2. D. MgSO4. 7.Trong các trường hợp sau, trường hợp nào không xảy ra phản ứng hoá học? (5 Điểm) A. Thả đinh sắt vào dung dịch đồng sunfat. B. Cho bột Zn vào dung dịch muối ăn. C. Cho dây đồng vào dung dịch bạc nitrat. D. Cho một miếng Na vào dung dịch sắt(II) clorua. 8.Ngâm một đinh sắt sạch trong dung dịch đồng(II) sunfat có màu xanh. Hiện tượng xảy ra là (5 Điểm) A. Chỉ có màu xanh của dung dịch ban đầu nhạt dần. B. Chỉ một phần đinh sắt bị hoà tan. C. Kim loại đồng màu đỏ bám ngoài đinh sắt, đinh sắt không bị hoà tan. D. Một phần đinh sắt bị hoà tan, kim loại đồng màu đỏ bám ngoài đinh sắt, màu xanh của dung dịch ban đầu nhạt dần. 9.Cặp chất khi phản ứng với nhau tạo thành chất kết tủa trắng? (5 Điểm) A. Ca(OH)2 và Na2CO3. B. NaOH và Na2CO3. C. KOH và NaNO3. D. Ca(OH)2 và NaCl. 10.Hòa tan hết 11,7 gam hỗn hợp gồm CaO và CaCO3 vào 100 ml dung dịch HCl 3M. Khối lượng muối thu được là (10 Điểm) A. 16,65 gam. B. 15,56 gam. C. 166,5 gam. D. 155,6 gam. 11.Để nhận biết 3 lọ mất nhãn đựng 3 dung dịch CuCl2, FeCl3, MgCl2 ta dùng: (10 Điểm) A. Quỳ tím B. Dung dịch Ba(NO3)2 C. Dung dịch AgNO3 D. Dung dịch KOH 12.Cho các chất CaCO3, HCl, NaOH, BaCl2, CuSO4, có bao nhiêu cặp chất có thể phản ứng với nhau? (10 Điểm) A.2 B. 4 C. 3 D. 5 13.Nếu chỉ dùng dung dịch NaOH thì có thể phân biệt được 2 dung dịch muối trong mỗi cặp chất sau: (5 Điểm) A.Na2SO4 và Fe2(SO4)3 B. Na2SO4 và K2SO4 C. Na2SO4 và BaCl2 D. Na2CO3 và K3PO4 14.Dung dịch muối tác dụng với dung dịch axit clohiđric là (5 Điểm) A. Zn(NO3)2 B. NaNO3. C. AgNO3. D. Cu(NO3)2. 15.Dung dịch tác dụng được với các dung dịch : Fe(NO3)2, CuCl2 là: (5 Điểm) A. Dung dịch NaOH B. Dung dịch HCl C. Dung dịch AgNO3 D. Dung dịch BaCl2 16.Có thể dùng dung dịch HCl để nhận biết các dung dịch không màu sau đây: (5 Điểm) A. NaOH, Na2CO3, AgNO3 B. Na2CO3, Na2SO4, KNO3 C. KOH, AgNO3, NaCl D. NaOH, Na2CO3, NaCl 17.Dãy muối tác dụng với dung dịch axit sunfuric loãng là: (10 Điểm) A. Na2CO3, Na2SO3, NaCl B. CaCO3, Na2SO3, BaCl2 C. CaCO3, BaCl2, MgCl2 D. BaCl2, Na2CO3, Cu(NO3)2

I. Turn these sentences into active voice. My mother often cooks delicious meals for us. ___________________________________________________________________________ My close friend writes emails to me twice a week. ___________________________________________________________________________ Mrs. Hoa usually sells fresh vegetables in the market near my house. ___________________________________________________________________________ Uncle Trung delivers milk in the mornings in our village. ___________________________________________________________________________ They have offered Quang the opportunity to study abroad. ___________________________________________________________________________ Was Tom given a lot of presents on his birthday? ___________________________________________________________________________ I advise you to revise the lesson carefully for the next exam. ___________________________________________________________________________ Is Professor Cook teaching that course this semester? ___________________________________________________________________________ The construction of the lecture hall cannot be completed until next month. ___________________________________________________________________________ Does your mother often prepare meals at home? ___________________________________________________________________________ Our school organizes camping activities on summer holiday. ___________________________________________________________________________

Cần làm gì để phát huy được hết tiềm năng, thế mạnh của ngành thủy sản nước ta?

1. He bought a jeep. His friend advised him against it. (although) 2. Where did you find out about Disneyland Resort? (get) Where_________ 3. When did you get up this morning? (out of) What time____________________________? 4. We were visiting an old building. They were going to a traditional market. ( while) 5. The artisan moulded the copper to make a bronze drum. (so that) help meeeeeeeeeeeeeeee

Cho x + y = 9; xy = 14. Tính giá trị biểu thức: c) x^3+y^3

Turn these sentences into passive voice People invented the wheel thousands of years ago. ___________________________________________________________________________ Are they building a statue of Chu Van An? ___________________________________________________________________________ Do four busy streets surround the Temple of Literature? ___________________________________________________________________________ They will not provide pencils at the test, so please bring your own. ___________________________________________________________________________ Mr. Binh hasn't taught us since the last semester. ___________________________________________________________________________ A student teacher is doing that experiment. ___________________________________________________________________________ Did you buy this dictionary two weeks ago? ___________________________________________________________________________ Alan's knowledge about science and technology doesn't impress me. ___________________________________________________________________________ They are going to build a new school here next year. ___________________________________________________________________________ I have used this computer for two years. ___________________________________________________________________________ Our English teacher often gives us a lot of homework. ___________________________________________________________________________ The Government plans to build a new road in each city every year. ___________________________________________________________________________

Exercise 5.10 Fill in the blanks in the following paragraph with before, after, as soon as, when, because, but, or so. Some of the words are used more than once. The children of Mrs. Peterson’s class went on a field trip to the city’s natural history museum. __________ they could go however, they had to give the principle their permission slips that their parents had signed. __________ collecting all the slips, the children got on the bus. Many of the children had never been to a museum ________ they were very excited about the outing. The drive to the museum took a long time __________ they had fun. Mrs. Peterson led the children in singing and playing games __________ time went by quickly. __________ they arrived at the museum, the group went straight to the dinosaur section. They went to this section first __________ they had been studying dinosaurs in class. ____________ the children saw the display of dinosaur bones, they began asking the museum guide questions. __________ the outing was very informative all the children had a great time.

III. Complete the sentences with the correct forms of MUST, HAVE TO or SHOULD 1. They __________ arrive in a few hours. 2. They __________ go home at 12 because my mother wants the motorcycle. 3. They insist that we __________ have a meal before the trip, 4. If there are no trains today, we will __________ go by coach. 5. I think you __________ tell your parents you’re going to be late so that they won’t be worried. 6. Visitors __________ feed the animals in the zoo. 7. The manager suggested that we __________ try to find another hotel. 8. You __________ see the film if you have time. 9. Staff __________ smoke when serving customers. 10. Do you think we __________ ask before we borrow the dictionary? 11. You __________ come to the party if you don’t want. 12. You __________ smoke at your age. 13. I don’t want to __________ wait in a queue for ages. 14. Do you think I __________ tell the teacher what happened? 15. My teacher told me that I __________ be late. 16. You __________ get up early tomorrow if you don’t want to miss the first bus. 17. Although you have a passport, you __________ have a visa to come to the USA. 18. Tom __________ go to the bank because he has no money left. 19. We __________ work late last night. 20. You __________ be carefully in public areas in big cities in order not to be cheated.

giai thich vi sao lai chon nhu the A party is a social gathering intended primarily for (21) ______ and recreation. Parties provide numerous (22) ______ for social interaction of various kinds, depending (23) ______ the participants and their standing of the accepted behavior for a given occasion. As a result, they tend to reinforce cultural standards. The purpose of the party is to bring together a group of people in a congenial atmosphere. All (24) ______ relationship is made pleasanter by simple good manners. This is especially true of table manners, a type of etiquette used when (25) ______. Different cultures have different standards for table manners. 21. A. ceremony B. recollection C. anniversary D. celebration 22. A. challenges B. occasions C. opportunities D. changes 23. A. in B. on C. of D. for 24. A. social B. national C. international D. personal 25. A. eating B. drinking C. talking D. playing

I. Turn these sentences into active voice. Meals are cooked by my sister every day. ___________________________________________________________________________ The floor was cleaned by my mother yesterday. ___________________________________________________________________________ Ten emails are written for 2 hours by my friend every day. ___________________________________________________________________________ Our house is painted by my father whenever Tet comes. ___________________________________________________________________________ Groceries were bought at the supermarket by my sister yesterday. ___________________________________________________________________________ A pencil is used to draw beautiful pictures by my brother. ___________________________________________________________________________ All their work was finished last night. ___________________________________________________________________________ Every morning, many morning exercises are done by me. ___________________________________________________________________________ Trees and flowers are planted in the garden by us every summer. ___________________________________________________________________________ Turn these sentences into passive voice