I. Write the correct form of verbs in the bracket. 1. It (be) often hot in summer. 2. The children often go (swim) in rivers after school. 3. It is necessary (water) the flowers twice a day. 4. Farmers are always busy with (harvest) their crops. 5. Mai (love) (listen) to the morning sounds in the countryside. 6. My father always (make) important decisions in my family. 7. In summer afternoons, children often (fly) kites especially when it (be) windy. 8. We sometimes (gather) around the campfire and (listen) to the elderly tell stories about my village's heroes. II. Give the correct forms of verbs in the brackets. 1. H5N1 virus (harm) ______human body very quickly. 2. Vegetarians (live) on vegetables, fruit and nuts. 3. Tina (sometimes, miss) the bus to school. 4. She (not like) housework at weekends. 5. They (eat) two eggs every day. That (not be) good for their health. 6. My mother and I usually (cook) meals for my family but my father (seldom, cook) . 7. Hoa and Ba sometimes (not water) the flowers in their garden. 8. My brother (spend) half an hour (do) his homework everyday III. Complete the sentences with the correct verb form. 1. John adores (play) badminton in the winter 2. My father sometimes goes (hunt) in the forests. He’d liketo find some more food for our family. 3. The boy (pick) up a stone and threw it in to the river. 4. He (collect) stamps from many countries since he (be) eight. 5. Which sports do you like (play)? 6. Hoa’s teacher wants her (spend) more time on math. 7. I promise I (try) my best next semester. 8. Sandra needs (improve) her English writing. 9. You should (underline) the word you want (learn) . 10. Can you help me (move) this table? 11. Nam always (get) grade A in Physics, but last semester he (get) B. 12. They were proud of (be) so successful.

Cho tam giác ABC vuông tại A . Từ một điểm K bất kì thuộc cạnh BC vẽ KH vuông góc AC . Trên tia đối của tia HK lấy điểm I sao cho HI = HK . Chứng minh A) AB // HK B) tâm giác AKI cân C) BAK = AKI D ) tam giác AIC = tam giác AKC

Chất CH3–CH=CH–CH=CH–CH3 có số đồng phân hình học là

Trình bày những nguyên nhân phát triển của nền kinh tế Mĩ sau chiến tranh thế giới thứ hai?

Đường dây truyền tải điện năng từ nhà máy điện đến nơi tiêu thụ với công suất điện 3,5 Mw.Hiệu điện thế tại trạm cung cấp điện là 2000V a. Tính công suất điện hao phí trên đường dây truyền tải? Biết đường dây có điện trở tổng cộng 20. b. Để giảm công suất điện hao phí 100 lần thì hiệu điện thế tăng bao nhiêu lần?Hiệu điện thế lúc này là bao nhiêu?

Nêu các phương pháp điều chế Cu , Na từ Cu(NO3)2 ,NaCl

Giúp mình câu 2 với ạ mình cảm ơn mn

Các bạn giúp mik với Câu 1: Một oxit của lưu huỳnh trong đó oxi chiếm 60 % về khối lượng . Tìm công thức phân tử của oxit đó. Câu 2: Đốt cháy 6,2 gam photpho trong bình chứa 7,84 lít oxi (đktc). Hãy cho biết sau khi phản ứng xảy ra hoàn toàn . a/ Photpho hay oxi, chất nào còn thừa và khối lượng thừa là bao nhiêu ? b/ Chất nào được tạo thành và khối lượng là bao nhiêu? (Cho P=31, O=16, S=32, C=12, Fe=56)

I. Give the correct form of the word given to complete the sentence. 1. Iceland is considered the most country in the world. (PEACE) 2. A lifestyle has its advantages and disadvantages. (NOMAD) 3.My brother has been a stamp for several years. (COLLECT) 4.It is a/ an place to hold a picnic because it is too far from the road. (CONVENIENCE) 5.Drinking water in some areas may be . (SAFE) 6.During my stay in the village, I was with several local farmers. (FRIEND) 7.Encouraging children to eat and drink is very important. (HEATH) 8.Local people in the village often wear their costumer during the festivals. (TRADITION) 9.Please give to that charity to help the homeless after the flood. (GENEROUS) 10.The baby slept very because the bed was really comfortable. (SOUND) 11. People in my country are very open and ______. I like to go there when I have free time. (FRIEND) 12.Some of my ______ live in the countryside (RELATE) 13. Some people say that the country is more _____ for the people who are retired. (SUIT) 14. Entertainment is difficult to find in the country, _____ in the evening. (PARTICULAR) 15.Natural disasters can ______ destroy a harvest and leave the farmers with little or no money until the following year. (EASY) 16. The pollution in our city is much _____________ than it used to be. (BAD) 17. These trousers are too wide. Do you have any that are _____________? (NARROW) 18. My mother always gets up _____________ than everybody else in the house. (EARLY) 19. Max finished the homework _____________ than anyone else in the class. (FAST) 20. Get rid of the sorrow! You will do it _____________ next time. (GOOD)

Câu 1: Cho các chất sau : Khí oxi (O2), Khí clo (Cl2), khí cacbonic (CO2), đồng (II) hiđroxit (Cu(OH)2), Chất nào là đơn chất? Hợp chất?Tính phân tử khối của các chất trên?