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https://hoidap247.com/cau-hoi/2261401 Cho A =$\frac{x^{5}}{30}$ - $\frac{x^{3}}{6}$ + $\frac{2x}{15}$ . CMR : A nhận giá trị nguyên khác 17 với mọi x thuộc số nguyên
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Ex I. Put the correct form of the verb in brackets. 1.Nam often ( play) ________________________ soccer in the afternoon. 2.My father used to (go) _____________________swimming when he was a child. 3.What about ( go) ____________________ to the zoo on Sunday evening ? 4. Tien Dung goalkeeper ( live ) _____________________ Thanh Hoa city since 1997. 5.I used to ( go) ____________________ to the zoo on Sundays when I was a child. 6.Xuan Truong footballer ( play) ________________________ soccer beautifully last Saturday. 7.Nam used to (go) _____________________fishing when he was a child. 8.They (learn ) _____________________ English for five years. 9.How about ( go) ____________________ to the zoo on Sunday evening ? 10.Quang Hai footballer ( play)________________________ soccer beautifully last Saturday. 11.I ( meet )______________________ her at the movie theater last night. 12.He ( go ) ___ to the English club every Sunday. But last Sunday he ( not go ) ________ there, he went to the City’s museum. 13.Two years ago, she ( teach ) ______________________ at a village school. 14.What __________you (do) ____________ yesterday morning? 15.We ( travel ) ______________________ to Hue next month. 16.My mother ( not like )______________________ riding a motorbike. 17.When my father was young, he (drink )_____________________ a lot of beer. 18.Nam ( study )______________________ homework in the living room now. 19.Be careful ! The car ( come )______________________ . 20.My mother ( go ) ______________________ to the supermarket yesterday evening. 21.Nam ( play) ________________________ soccer tomorrow. 22. By 2030, people in Viet Nam (spend) _____________________ a lot of money on heating. 23. What_____________we (do ) ____________________ to save electricity ,dad ? We will watch less TV. 24. At 10 o’clock tomorrow he ( work ) _____________________ in his office. 25. My father ( visit ) ____________________ to Ha Long Bay next week. 26.We ( build)________________________ a hydro power station in this area next month. Ex II. Put the verb in brackets in the Past Simple or Past Perfect: 1. They (go) ……………..home after they (finish) ………………… their work. 2. She said that she (already, see) ……………………. Dr. Rice. 3. After taking a bath, he (go) ………………………….. to bed. 4. He told me he (not/eat) ………………………… such kind of food before. 5. When he came to the stadium, the match (already/ begin) …………………………………. 6. Before she (watch) ………………….. TV, she (do)……………………. homework. 7. What (be) …………….. he when he (be) ………………. young? 8. After they (go) ………………………, I (sit) ……………….. down and (rest) …………… 9. Yesterday, John (go) ………………….. to the store before he (go) ………………… home. 10. She (win) ………………………. the gold medal in 1986. 11. Our teacher (tell) …………… us yesterday that he (visit) …………… England in 1970. 12. Alan (have)……….hardly(prepare)………..for dinner when her husband (go) ……..home 13. No sooner (have)…………….I (watch)……………. TV than the phone (ring)………… 14. Before I (watch) ……………… TV, I (do) ………………………….. my homework. 15. After I (wash)………………………….my clothes, I (sleep) …………………………… 16. “ It is the first time I have eaten sushi” , said Bill. → Bill said it (be) ……….. the first time he (eat) ……………….. sushi. 17. “ I broke my glasses yesterday”, said Lan. → Lan said that she (break) ………………………………… her glasses the day before. 18. I couldn’t attend the evening classes because I worked at night. → If I (not work) …………….. at night, I (attend) ………………….. the evening classes. 19. I didn’t have a laptop so I wish I (have) ………………………. a laptop. 20. You didn’t stay home. I would rather you (stay) …………….. home.

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