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Eljoy
2 năm trước
Tìm đa thức bậc 3 biết p(0)=0, p(x+1)-p(x)=3x(x+1)
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Choose the best answer among A, B, C, or D. 1. “May I speak to Dr. Shell, please?” - “I’m sorry, he _____ a patient at the moment. Can I help you? A. is seeing B. sees C. has been seeing D. was seeing 2. “When are you going to ask your boss for a rise?” “I _____ to her twice already! I don’t think she wants to give me one.” A. have talked B. have been talking C. was talking D. had talked 3. “Do you think Tom will want something to eat after he gets here?” “I hope not. It’s probably being after midnight, we _____” A. are sleeping B. will be sleeping C. have been sleeping D. be sleeping 4. “Paul, could you please turn off the stove? The potatoes _____ for a least thirty minutes.” A. are boiling B. boiling C. have been boiling D. boiled 5. “It’s true that spaghetti didn’t originate in Italy?” “Yes. The Chinese _____ spaghetti dishes for a long time before Marco brought it back to Italy” A. have been making B. have made C. had been making D. make 6. “I once saw a turtle that had wings. The turtle flew into the air to catch insects” “Stop kidding. I _____ you.” A. don’t believe B. am not believing C. didn’t believe D. wasn’t believing 7. “Could someone help me lift the lawnmower into the pickup truck?” - “I’m not busy. I _____ you” A. help B. will help C.am going to help D. am helping 8. My family loves this house. It _____ the family home ever since my grandfather built it 60 ago. A. was B. has been C. is D. will be 9. Here’s an interesting statistic. On a typical day, the average person _____ about 48,000 words. How many words did you speak today? A. spoke B. was speaking C. speaks D. is speaking 10. It’s against the law to kill the black rhinoceros. They _____ extinct. A. became B. have become C. become D. are becoming

Use the correct form of verbs in brackets. 1. When we (arrive) ______________ in London tonight, it probably (rain) ______________. 2. It (rain) ______________ hard. We can’t do anything until it (stop) ______________. 3. Last night we (watch) ______________ TV when the power (fail) ______________. 4. That evening we (stay) ____________ up to talk about the town where he (live) _____________ for some years. 5. They (not work) ________________ on Sunday and they (work) ____________ from Monday to Saturday. 6. Half way to the office Paul (turn) ______________ round and (go) ______________ back home because he (forget) ______________ to turn the gas off. 7. London (change) ______________ a lot since we first (come) ______________ to live here. 8. While we (talk) ______________ on the phone the children (start) ______________ fighting and (break) ______________ a window. 9. He used to talk to us for hours about all the interesting things he (do) ______________ in his life. 10. You know she (stand) ______________ looking at that picture for the last twenty minutes. 11. I (spend) ______________ a lot of time travelling since I (get) ______________ this new job. 12. When I (be) ______________ at school, we all (study) ______________ Latin. 13. When I (meet) ______________ him, he (work) ______________ as a waiter for a year or so. 14. After he (finish) ______________ breakfast he (sit) ______________ down to write some letters. 15. My grandfather (fly) _______ never _______ in an airplane, and he has no intention of ever doing so.

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