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ncnkncnk
2 năm trước
một người mắt bình thường, cực cận cách mắt 20cm, dùng một kính lúp tiêu cự 5cm, mắt đặt tại tiêu điểm ảnh của kính.vị trí đặt vật khi ngắm chừng cực cận là .... cm
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V. Read the text below and decide which answer (A, B, C or D) best fits each gap. E-mail, and chat rooms let children communicate (18) _____ friends and family members. They can also allow children to connect with people that they have never (19) _____ in person. Knowing a little about each of these communication services can help parents (20) _____ children safer while online. Through e-mail, (21) _____ can easily send and receive messages. These messages may also have text, audio, and picture files attached. Signing up for an e-mail account is simple (22) _____ most services offer them for free. Sometimes these messages contain viruses, or other inappropriate content, so parents should warn children to be wary of emails from (23) _____ people. Chat rooms are online hang-out spots where anyone can talk about (24) _____ - current events, books, and other common interests. Users often do not know each other in real life, so it is important that parents keep a close eye on the content of any (25) _____. 18. A. to B. with C. for D. through 19. A. met B. gone C. asked D. called 20. A. save B. protect C. surround D. keep 21. A. receivers B. messengers C. users D. partners 22. A. due to B. because C. because of D. in order to 23. A. known B. well-known C. unknown D. unpopular 24. A. every B. something C. nothing D. anything 25. A. conversations B. meetings C. letters D. users Giúp mình với 😗

6. "My mother doesn't like coffer but parents enjy deiniking beer, sa NHgk. 7. "I haven't seen him todoy, "said Lan. lan said ted Vadutieer hum shar doy 8. She said, "I am working on my project now." shesad sthe vv as Wo m 9. Laura to John: "Now it is raining heavily here." 10. Minh said to his friend: "My brother is doing his home in the room now. 11. John said, "My sister has given me an expensive bicycle on my birthday. 12. Kate said: "We haven't done our exercise since yesterday. 13. Jack said to his teacher: "I had done my exercise beforeI went to bed". 14. He said, "I took this picture two month ago." 15. Peter said to John: "I don't remember I gave you the book last week. 16. "My friend visited me yesterday," Peter said to the police. 17. They said: "We were playing football when it started to rain yesterday". 18. Jack said to Kate: "I will love you forever". 19. He said to Linda: "I can do anything for you to make you happy". 20. Nick: "It may rain next week".

make questions for the underlined parts: 1,I am class 7A .................................................................? 2, we can understand this test ..................................................................? 3,a hat is six thousand VNDs ..................................................................? 4,we go out every Monday .....................................................................? 5,Jack collects stamps .................................................................? 6,we are learning to play the guitar ..................................................................? 7,they have three children .......................................................................? 8,he does business to earn money ........................................................................? 9,they are 170 cm tall ..............................................................? 10,the woman has to wear uniform ...............................................................? phần gạch chân đây nha 1,7A 2, This test 3,six thousand VNDs 4,every Monday 5, stamps 6,the guitar 7,three 8,business 9,170 cm 10uniform

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