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Một doanh nghiệp tư nhân bán vật liệu xây dựng, bình quân mỗi ngày bán được: 1 tấn xi măng, biết: xi măng: 700000đ/1tấn. Chi phí hết 80% tổng doanh thu. Vậy lợi nhuận của doanh nghiệp là bao nhiêu? A. 140.000 đồng B. 280.000 đồng C. 70.000 đồng D. 210.000 đồng
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6. Verb Forms A.Complete these sentences, using the correct form of verb in brackets: 1.We enjoy (swim)………………… along this river. 2.Children have just stopped ( play)……………………….. football. 3.They keep ( talk)…………………………… about an old friend they met yesterday. 4.Would you mind ( help)……………………………. me with this work? 5.It started (rain)……………… an hour ago. Has it stopped ( rain)………………… yet? 6.They prefer (play)………………………… in swimming pool all day. 7.I used (smoke)………………… 20 cigarettes a day,but now I give up (smoke)………… 8.We decided (rent)……………………… a house with a swimming pool. 9.Let me ( pay)………………………………….. for the meal.You paid last time. B. Choose the best answer: 1.We are looking forward _____ you again soon. A. to see B. to seeing C. saw D. have seen 2.I suggest _____ some more mathematical puzzles. A. do B. to do C. doing D. done 3.Would you mind _____ the door? A. open B. to open C. opening D. opened 4.You should give up _____ or you will die of cancer. A. smoke B. to smoke C. smoking D. smoked 5.The driver stopped _____ a coffee because he felt sleepy. A. have B. to have C. having D. had 6.You had better _____ at home until you feel better. A. stay B. to stay C. staying D. stayed 7.You can’t stop me from _____ what I want. A. doing B. do C. to do D. that I do 8.He tried to avoid ______ my question. A. answering B. to answer C. answer D. how to answer 9.Jim is 65, but he isn’t going to retired yet. He wants to carry on _____. A. to work B. work C. works D. working 10.Cathy suggested _____ to the cinema. A. went B. not to go C. not go D. going

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