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thanhnguyenn1012
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phân tích đa thức thành nhân tử 3x^2-6xy+3y^2 12x^5y+24x^4y^2+12x^3y^3 64xy-96x^2y+48x^3y-8x^4y 54x^3+16y^3 giúp mk với mk đag cần gấp . Cho mk cảm ơn tr nhé !
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1) Young people ______ obey their parents. a. must b. may c. will d. ought to 2) Laura, you and the kids just have dinner without waiting for me. I ______ work very hard today. a. can b. may c. should d. would 3) I ______ be delighted to show you round the factory. a. ought to b. would c. might d. can 4) Leave early so that you ______ miss the bus. a. didn’t b. won’t c. shouldn’t d. mustn’t 5) Jenny's engagement ring is enormous! It ______ have cost a fortune a. must b. might c. will d. should 6) You ______ to write them today. a. should b. must c. had d. ought 7) I hope I ______ find it. a. will b. shall c. could d. must 8) Unless he runs he______ catch the train. a. will b. mustn’t c. wouldn’t d. won’t 9) ______ you be in Rome tonight. a. will b. may c. might d. maybe 10) We ______ have time to help you tomorrow. a. may b. must c. will d. could. 11) "______ you hand me that pair of scissors, please?" a. May b. Will c. Shall d. Should 12) Jeanette did very badly on the exam. She _____ harder. a. must have studied b. should have studied c. could have studied d. must studied 13) He was very lucky when he fell off the ladder. He _____ himself. a. could have hurt b. should have hurt c. must have hurt d. will have hurt 14) Marcela didn't come to class yesterday. She _____ an accident. a. should have had b. might have c. must have d. may have had 15) John still hasn't come out. He ______ everything for the trip now. a. must have been preparing b. will be preparing c. must be preparing d. will have prepared 16) Thomas received a warning for speeding. He _____ so fast. a. shouldn't have driven b. would have driven c. should have d. might have driven 17) The photos are black. The X-ray at the airport _____ them. a. should have damaged b. would have damaged c. would damage d. must have damaged 18) Tom didn't do his homework, so the teacher became very angry. He _____ his homework. a. must have done b. should have done c. might have d. will have done 19) My car stopped on the high way. It _____ out of gas a. may run b. may have run c. must be d. should have run 20) Robert arrived without his book. He _____ it. a. could have lost b. should have lost c. would have lost d. will have lost 21) "Where do you think Rooney is today?". "I have no idea. He _____ late." a. should have left b. would have sleep c. would sleep d. may have sleep 22) Berbatov painted his bedroom black. It looks dark and dreary. He _____ a different color. a. had to choose b. should have chosen c. must have chosen d. could have been choosing 23) The children _____ "thank you" to you when you gave them their gifts. a. will have said b. must say c. should have said d. should say 24) If we had known your new address, we _____ to see you. a. came b. would have come c. will come d. would come 25) These two boys look identical. They _____ twins. a. must have been b. must be c. should be d. should have been giải thích với nha

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