Cho hình vuông ABCD cạnh a. Gọi M là điểm di động trên đường chéo AC. Kẻ ME vuông góc với AB tại E và kẻ MK vuông góc BC tại K. Xác định vị trí M trên AC để diện tích tam giác DEK đạt Min Đừng quên hướng dẫn mk cách vẽ hình trên Hoidap247 nhé Giải chi tiết + vẽ hình + cho mk tips vẽ hình = ctlhn + 5 sao + cảm ơn

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Part I. Choose the word, phrase or expression which best completes each sentence. (30 points) 1.His house looks very large and beautiful. It is _house. A. a seven-room B. a seven-rooms C. seven room D. seven rooms 2.Tim: “Would you mind lending me your dictionary?” Paul: “ .” A. Yes, let’s B. Great C. No, of course not D. Yes. Here you are 3.It’s no use _ a language if you don’t try to use it. A. to learn B. learned C. learning D. learn 4.The college got some money by selling one of its old pictures. A. helpful B. usual C. valuable D. useful 5. Mr. Man was given a medal in of his service to his country. A. gratitude B. knowledge C. recognition D. response 6. You can’t tell what someone is like just from their . A. character B. looking C. appearance D. personality 7. It’s high time Huy got a steady job and . He’s almost thirty. A. turned down B. turned in C. settled down D. settled in 8. You haven’t heard all the facts so don’t to conclusion. A. jump B. dash C. fly D. spring 9.A person who is concerned only his own interests cannot be a true friend. A. with B. in C. for D. about 10.Can you tell me the............... of these shoes? A. charge B. price C. amount D. expense 11. As soon as you that, I’d like you to go to bed. A. have done B. did C. will do D. will have done 12. Don’t be in by her charm – she’s ruthless. A. let B. put C. taken D. dropped 13. A huge tree crashed through the roof and broke my bed. in the room, I would have been killed. A. Should I be B. Had I been C. Would I be D. Would I have been 14. Elderly people, , require constant attention. A. a large number’s depending on government aid B. and many of them depend on the government to finance them C. who are dependent many of them on the financing from the government D. many of whom are financially dependent on the government 15. Mai has ; she loves cakes, chocolate, ice-cream – anything which is sweet. A. a sweet mouth B. sweet lips C. a sweet tooth D. a sweet tongue Part II. Complete the following sentences with an appropriate form of the word in capitals.(10 points) 1. We feel that the laws against begging should not be…………FORCE. 2. It seems unjust to arrest a poor old person for……………SHOP.. 3. Many.............. people sleep on the street of the capital.HOME 4. This statue............................... the soldiers who died in the war.MEMORY 5. Police arrested well-known…............... before the match.TROUBLE

61. Where you (be)............................? - I (be).................................... out in a yacht. ~ You (enjoy) ................. it? ~Yes, very much. We (take)...................... part in a race. ~ You (win)........................? ~No, we (come) ............................... in last. 62.- How long that horrible monument (be) ............................................there? -It (be)................... there six months. Lots of people (write) ...............................to the Town Council asking them to take it away but so far nothing (be) .........................................done. 63. Hannibal (bring) .......................................elephants across the Alps. ~Why he (do) .............that? ~He (want) ...................................to use them in battle. 64. Where you (be)........................? ~ I (be)........................................ to the dentist. ~ He (take)............... out your bad tooth? ~Yes, he . ...... . ~ It (hurt)..........?-Yes, horribly. 65. She (say)..................... that she'd phone me this morning, but it is now 12.30 and she (not phone) ............................................yet. 66. I just (receive)............................... a letter saying that we (not pay) ........................this quarter's electricity bill. I (not give) .................................you the money for that last week? ~Yes, you . .............. , but I'm afraid I (spend) .................................... it on something else. 67. How long you (be)....................... out of work? ~I'm not out of work now. I just (start) ....................................................a new job. ~How you (find)................. the job? ~I (answer)...................... an advertisement in the paper. 68. You (finish).............. checking the accounts? ~No, not quite. I (do)........... about half so far. 69.I (cut)............... my hand rather badly. Have you a bandage? ~I'll get you one. How it (happen)...................? ~I was chopping some wood and the axe (slip).......................... 70. How you (get)................. that scar? ~I (get).................... it in a car accident a year ago. 71. You (meet)................... my brother at the lecture yesterday? ~Yes, I .. .. We (have) ....................................coffee together afterwards. 72. He (lose).................. his job last month and since then he (be)............................ out of work. ~Why he(lose)................ his job? ~He (be)................................ very rude to Mr Pitt. 73. What are all those people looking at? ~ There (be)................................. an accident. ~You (see).......... what (happen)...................? ~Yes, a motor cycle(run) ..............into a lorry. 74. I(phone)............................. you twice yesterday and (get)............................ no answer. 75. Originally horses used in bull fights (not wear)............................. any protection, but for some time now they (wear)..................................... special padding, 76. That house (be) ........................... empty for a year. But they just (take).......................... down the 'For Sale' sign, so I suppose someone (buy)................................................. it. 77- Where is Tom? - I (not see) ....................him today