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

giúp mk hết nhé thanks đúng nhất

làm giúp e 2 câu b và d ạ (hứa vote 5* ạ! )

1. Mid-Autumn Festival not only recalls the family love, _________ is also a festival for both children and adults in Vietnam. a. and b. but c. yet d.therefore 2. Tran Temple Festival lasts from the 15th-20th of lunar August. _________, visitors all over the country eagerly go on a pilgrimage far prior to the day. a. Nevertheless b. Otherwise c. Therefore d. Moreover 3. _________ the main worship event is taking place at Hung Temple, 100 lanterns are released into the sky. a. Because b. Even though c. While d. If 4. Lim Festival is among the most impressive festivals, ceremonies _____ singing events. a. or b. but c. yet d. and 5. The navigation of the boat, called ghe ngo, requires great skills _____ it can easily be flipped. a. therefore b. because c.when d. although 6. _________ you consider yourself a culture enthusiast, Hue Arts Festival is a must. a. If b. Though c. Because d. As 7. The festival only lasted for three days; ______ they spent nearly a month preparing for it. a. when b. moreover c. otherwise d. however 8. In Quang Ninh, you can go to Yen Tu Mountain to attend the Yen Tu Festival, ______ you can visit Ha Long Bay. a. so b.yet c.or d.otherwise 9. _________ there are loads of festivals in Vietnam, Tet or Tet Nguyen Dan is the most important one. a. Since b.Although c.When d. As long as 10. Festival visitors can take part in cultural activities, such as visiting art galleries, historical places and parks. _________, they can taste exotic food and dishes. a. Moreover b.Therefore c.However d.Otherwise MONG MN GIÚP MÌNH BÀI NÀY. CẢM ƠN Ạ!

Thành phần biệt lập trong câu: “Có lẽ bắt đầu từ những đêm sương sa thì bóng tối đã hơi cứng và sáng ngày ra trông thấy màu trời có vàng hơn mọi khi.” là: a. Thành phần tình thái b. Thành phần cảm thán c. Thành phần phụ chú d. Thành phần gọi đáp