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HABIE2007
2 năm trước
Chứng minh `n^2 + n + 16` không chia hết `49` với mọi số `n ∈ Z`
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Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Question 5: Sirius, the Dog Star, is the most brightest star in the sky with an absolute magnitude A B about twenty-three timesthat of the sun. C D Question 6: Killer whales tendto wander in family clusters that hunt, play, and resting together. A B C D Question 7: Alloys of gold and copper have been widelyusing in various types of coins. A B C D Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Question 8: There should be an international law against ______. A. afforestation B. deforestation C. forestry D. reforestation Question 9: I’d rather you _____ home now. A. going B. go C. gone D. went Question 10: Don’t worry! I have _____ tire at the back of my car. A. another B. other C. others D. the other Question 11: ______ he arrived at the bus stop when the bus came. A. No longer has B. No sooner had C. Not until had D. Hardly had Question 12: Susan’s doctor insists _____ for a few days. A. that she is resting B. her resting C. that she rest D. her to rest Question 13: We couldn’t fly _____ because all the tickets had been sold out. A. economical B. economy C. economic D. economics Question 14: Through an ______, your letter was left unanswered. A. overtone B. overcharge C. overtime D. oversight Question 15: My mother told me to ______for an electrician when her fan was out of order. A. send B. write C. rent D. turn Question 16: Jane _____ law for four years now at Harvard. A. is studying B. has been studying C. studies D. studied Question 17: He _____ to the doctor after the accident, but he continued to play instead. A. must have gone B. should have gone C. couldn’t go D. didn’t have to go Question 18: I won’t change my mind _____ what you say. A. whether B. no matter C. because D. although Question 19: How many times have I told you ______ football in the street? A. not playing B. do not play C. not to play D. not to have played

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