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Sắp xếp câu a/clothes / my father / I / ironed / for / yesterday /. / A. my father ironed clothes for I yesterday. B. I ironed clothes for my father yesterday. C. I ironed my clothes for father yesterday. D. I ironed my father for clothes yesterday. b/teeth / The dentist / Minh / his / to brush / forget / not to / told /. / A. The dentist told Minh not to brush his teeth to forget. B. Minh told The dentist not to forget to brush his teeth. C. The dentist told Minh not to forget to brush his teeth. D. not to forget to brush his teeth The dentist told Minh.
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Bài 1: Bóng của một ống khói nhà máy trên mặt đất có đọ dài là 36,9 m .Cùng thời điểm đó ,một đó, một thanh sắt cao 2,1m cắm vuông góc với mặt đất có bóng dài 1,62m Bài 2: Cho tam giác ABC cân tại A ,AB =15 cm :AC=20 .Kẻ đường cao AH . a)Cm Tam giác ABC đồng dạng với tam giác HBA b)AB^2=BC nhân BH c)Tính BH và CH d)Kẻ HM vuông gócAB và HN vuông góc AC . chứng minh AM. AC ,từ đó chứng minh tam giác AMN đồng dạng tam giác ACB Bài 3:Cho tam giác ABC cân tại A .Kẻ đường cao AE và BF cắt nhau tại H a)Chứng minh tam giác CBF đồng dạng tam giác CAE b)chứng minh tam giác HA.HE=HB.HF c)Biết AB-20 cm ,AF=12cm .Tính BH và HF d)Chứng minh CE.CB=AH.AE=AC^2 Bài 4: Cho hình chữ nhật ABCD có AB=8cm BC=6cm.Kẻ AH vuông góc với BD tại H a)chứng minh tam giác AHB đồng dạng tam giác BCD b) Chứng minh AH.BD=AD.AB c)Kẻ phân giác BM của ABD .tính MA,MD? d)Tính diện tích tam giác AHB?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. A Mission to Mars Have you ever had a dream of traveling to another planet in our solar system? If you have, there is an actual programme that is happening right now, and it hopes to send people to Mars in 2023. Known as the Mars One Mission, it will send a crew of four people on a one -way mission to colonize Mars. Those chosen people will have to be ready to say good-bye to the earth forever, as there will not be a return trip. For the people chosen, they will have to learn to do many different things. First of all, they will be living the rest of their lives with just a handful of other people, so they all must have personalities that allow them to get along. Second, the living quarters that they will have won’t be very spacious, so they will have to deal with that condition as well. If they feel homesick, they will only be able to communicate with people back on the earth via e-mail, video and audio sent back and forth. However, there won’t be any real-time communication. Even at the speed of light, communication between the earth and Mars takes about 20 minutes. Whether the Mars One Mission will actually happen is the big question that a lot of people are asking. There is an enormous skepticism in the science community, and Wired magazine gave the mission a miserable score of two out of ten on its probability scale. However, for those who dream of going to Mars, at least they can say there is a possibility that it could happen. What will NOT happen to the people who go on the Mars One Mission? A: They will live in quarters that don’t have a lot of space inside. B: They will have to live with other people. C: They will return to the earth D: They will communicate with people on the earth.

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