2. What verb/noun means to test an idea; a scientific test → thí nghiệm, thử nghiệm? ➥Example: The scientists are e_ _ _ _ _ _ _ _ _ _ with new drugs. (synonym: test, trial)

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3. What verb means to work or make something work → vận hành, điều khiển? ➥Example: She o_ _ _ _ _ _ s the machine carefully. (synonym: control, run)

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4. What adjective means working by itself without human control → tự động? ➥Example: This car has an a_ _ _ _ _ _ _ system. (synonym: self-operating, mechanical)

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5. What noun means a small useful device → dụng cụ, tiện ích? ➥Example: This kitchen g_ _ _ _ _ saves time. (synonym: device, tool)

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6. What noun/adjective means a light artificial material → nhựa, bằng nhựa? ➥Example: The bottle is made of p_ _ _ _ _ _. (synonym: polymer)

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7. What adjective means difficult to understand → phức tạp, rắc rối? ➥Example: This problem is c_ _ _ _ _ _ _ _ _ _. (synonym: complex, tricky)

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8. What noun means the physical parts of a computer → phần cứng? ➥Example: The h_ _ _ _ _ _ needs upgrading. (synonym: equipment, components)

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9. What verb/noun means (v) to write code; (n) a computer application → lập trình, chương trình? ➥Example: He p_ _ _ _ _ s apps for phones. (synonym: code, application)

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10. What verb/noun means (v) to reduce; (n) reduction → giảm, sự giảm? ➥Example: The price d_ _ _ _ _ _ _ d last month. (synonym: reduce, decline)

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11. What verb means to create something new → phát minh, sáng chế? ➥Example: Edison i_ _ _ _ _ ed the light bulb. (synonym: create, devise)

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12. What noun means serious study of a subject → nghiên cứu? ➥Example: He does r_ _ _ _ _ _ _ on cancer. (synonym: study, investigation)

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13. What adjective means using electronic signals → kỹ thuật số? ➥Example: She bought a d_ _ _ _ _ camera. (synonym: electronic)

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14. What verb means to include or have as a part → liên quan, tham gia? ➥Example: The job i_ _ _ _ _ _ s teamwork. (synonym: include, engage)

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15. What verb means to make something work or operate → chạy, vận hành? ➥Example: The software r_ _ _ s on this computer. (synonym: function, operate)

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16. What verb means to find something for the first time → khám phá, phát hiện? ➥Example: They d_ _ _ _ _ _ ed a new planet. (synonym: uncover, detect)

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17. What noun means a place for scientific experiments → phòng thí nghiệm? ➥Example: She works in a l_ _ _ _ _ _ _ _ _. (synonym: lab)

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18. What noun means a flat surface showing images → màn hình? ➥Example: Don’t stare at the s_ _ _ _ n too long. (synonym: display, monitor)

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19. What noun means a result or influence → tác động, hiệu ứng? ➥Example: Smoking has bad e_ _ _ _ _ s on health. (synonym: impact, consequence)

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20. What verb/noun means (v) to not have; (n) absence of something → thiếu, sự thiếu? ➥Example: The project l_ _ _ s funds. (synonym: shortage, absence)

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21. What noun means programs used by a computer → phần mềm? ➥Example: She designs s_ _ _ _ _ _ _. (synonym: applications)

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22. What noun means tools for a job or activity → thiết bị, dụng cụ? ➥Example: The lab has modern e_ _ _ _ _ _ _ _. (synonym: tools, apparatus)

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23. What noun means a portable computer → máy tính xách tay? ➥Example: He bought a new l_ _ _ _ _. (synonym: notebook computer)

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24. What adjective means happening quickly, unexpectedly → đột ngột, bất ngờ? ➥Example: There was a s_ _ _ _ _ change in weather. (synonym: abrupt, rapid)

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25. What verb means to guess the value, size, or cost → ước tính, dự đoán? ➥Example: He e_ _ _ _ _ d the cost at $500. (synonym: calculate, approximate)

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26. What adjective means the greatest possible amount → tối đa? ➥Example: The m_ _ _ _ _ _ speed is 120 km/h. (synonym: utmost, highest)

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27. What noun means scientific knowledge used in practice → công nghệ? ➥Example: Modern t_ _ _ _ _ _ _ _ _ changes life. (synonym: science, innovation)

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28. What adjective means completely correct → chính xác? ➥Example: That’s the e_ _ _ _ answer. (synonym: precise, accurate)

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29. What adjective means the least possible amount → tối thiểu? ➥Example: The m_ _ _ _ _ _ age is 18. (synonym: least, lowest)

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30. What adjective means being the only one of its kind → duy nhất, đặc biệt? ➥Example: This design is u_ _ _ _ _. (synonym: one-of-a-kind, special)

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31. What phrasal verb means to stop working → hỏng? ➥Example: The car b_ _ _ _ d_ _ _ on the road. (synonym: stop, fail)

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32. What phrasal verb means to find by chance → tình cờ gặp, tình cờ tìm thấy? ➥Example: I c_ _ _ _ a_ _ _ _ _ an old friend. (synonym: encounter, meet)

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33. What phrasal verb means to learn or discover → tìm ra, phát hiện? ➥Example: He f_ _ _ d o_ _ the truth. (synonym: learn, discover)

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34. What phrasal verb means to invent a story or excuse → bịa, dựng chuyện? ➥Example: She m_ _ _ u_ an excuse. (synonym: fabricate, invent)

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35. What phrasal verb means to succeed in something difficult → thành công (khó)? ➥Example: He p_ _ _ ed o_ _ the deal. (synonym: succeed, manage)

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36. What phrasal verb means to get rid of something → vứt đi, bỏ đi? ➥Example: Don’t t_ _ _ w a_ _ y your notes. (synonym: discard, dispose)

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37. What phrasal verb means to stop a machine or light → tắt? ➥Example: Please t_ _ n o_ f the TV. (synonym: switch off, shut down)

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38. What phrasal verb means to start a machine or light → bật? ➥Example: T_ _ _ o_ the light, please. (synonym: switch on, activate)

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39. What phrase means finally, after a long time → cuối cùng? ➥Example: A_ l_ _ _ we arrived home. (synonym: finally, eventually)

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40. What phrase means not planned, accidentally → tình cờ? ➥Example: We met b_ c_ _ _ _ e. (synonym: accidentally)

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41. What phrase means what I think → theo ý kiến của tôi? ➥Example: I_ m_ o_ _ _ n, this is wrong. (synonym: I think, from my view)

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42. What phrase means finally, after something finishes → cuối cùng? ➥Example: I_ t_ _ e_ _ , he passed the test. (synonym: finally, ultimately)

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43. What phrase means at a later time → trong tương lai? ➥Example: We’ll meet again i_ t_ e f_ _ _ _ e. (synonym: later, eventually)

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44. What phrase means not working → hỏng? ➥Example: The lift is o_ _ o_ o_ _ _ _. (synonym: broken, faulty)

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45. What verb means to heat liquid until bubbles form → sôi, đun sôi? ➥Example: We need to b_ _ _ the water first. (synonym: heat, simmer)

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46. What noun means a machine that heats water → nồi hơi, lò hơi? ➥Example: The b_ _ _ _ _ needs repair. (synonym: heater)

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47. What adjective means very hot → nóng sôi, cực nóng? ➥Example: It’s b_ _ _ _ _ g outside today. (synonym: scorching)

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48. What noun means a person working with chemicals → nhà hóa học, dược sĩ? ➥Example: The c_ _ _ _ _ t is in the lab. (synonym: pharmacist, scientist)

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49. What noun/adjective means a substance used in chemistry; relating to chemistry → hóa chất? ➥Example: This c_ _ _ _ _ _ l is dangerous. (synonym: compound, substance)

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50. What noun means the science of substances → hóa học? ➥Example: She studies c_ _ _ _ _ _ _ y at university. (synonym: science of matter)

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51. What verb means to finish or decide something → kết luận, kết thúc? ➥Example: He c_ _ _ _ _ _ _ d the meeting early. (synonym: finish, decide)

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52. What noun means the final part or decision → kết luận? ➥Example: The c_ _ _ _ _ _ _ _ n was clear. (synonym: ending, result)

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53. What verb means to look at something carefully → kiểm tra, khám xét? ➥Example: The doctor e_ _ _ _ _ _ d the patient. (synonym: inspect, check)

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54. What noun means a test or careful check → kỳ thi, sự kiểm tra? ➥Example: He passed the e_ _ _ _ _ _ _ _ _ _ n. (synonym: test, assessment)

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55. What noun means a person who sets or marks exams → giám khảo, người chấm thi? ➥Example: The e_ _ _ _ _ _ r asked difficult questions. (synonym: assessor, tester)

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56. What verb means to interest someone greatly → làm mê hoặc? ➥Example: The story f_ _ _ _ _ _ _ s me. (synonym: attract, charm)

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57. What noun means strong interest in something → sự mê hoặc? ➥Example: He has a f_ _ _ _ _ _ _ _ _ n with space. (synonym: obsession, attraction)

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58. What adjective means very interesting → hấp dẫn, thú vị? ➥Example: This is a f_ _ _ _ _ _ _ _ _ g book. (synonym: captivating, engaging)

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59. What noun means the study of past events → lịch sử? ➥Example: He loves reading h_ _ _ _ _ y. (synonym: past events)

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60. What adjective means important in history → mang tính lịch sử? ➥Example: That was a h_ _ _ _ _ _ event. (synonym: significant, memorable)

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61. What noun means a person who studies history → nhà sử học? ➥Example: She is a famous h_ _ _ _ _ _ _ n. (synonym: scholar)

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62. What adjective means exactly the same → giống hệt? ➥Example: The twins are i_ _ _ _ _ _ _ _ l. (synonym: same, indistinguishable)

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63. What adverb means in exactly the same way → giống hệt nhau? ➥Example: They dressed i_ _ _ _ _ _ y. (synonym: similarly)

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64. What adjective means measuring a great distance → dài? ➥Example: The road is very l_ _ g. (synonym: extended)

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65. What noun means measurement of how long something is → chiều dài? ➥Example: The l_ _ _ _ h of the river is 500 km. (synonym: extent, span)

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66. What verb means to find the size of something → đo? ➥Example: He m_ _ _ _ _ d the table. (synonym: calculate, gauge)

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67. What noun means the size found when measuring → sự đo lường? ➥Example: The m_ _ _ _ _ _ _ _ t is in centimeters. (synonym: dimension)

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68. What noun means knowledge about the natural world → khoa học? ➥Example: S_ _ _ _ _ e has changed our lives. (synonym: knowledge, discipline)

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69. What noun means a person who studies science → nhà khoa học? ➥Example: Einstein was a great s_ _ _ _ _ _ t. (synonym: researcher)

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70. What adjective phrase means not the same → khác với? ➥Example: This book is d_ _ _ _ _ _ _ f_ _ m the movie. (synonym: unlike)

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71. What phrase means containing a lot → đầy? ➥Example: The box is f_ _ _ o_ toys. (synonym: loaded with)

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72. What phrasal verb means to start something using → bắt đầu với? ➥Example: We b_ _ _ n the lesson w_ _ h a game. (synonym: commence with)

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73. What phrasal verb means to join two things together → kết nối với? ➥Example: C_ _ _ _ _ t the printer t_ the computer. (synonym: link, attach)

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74. What phrasal verb means to separate something → ngắt kết nối? ➥Example: Please d_ _ _ _ _ _ _ _ the cable f_ _ _ the socket. (synonym: unplug, detach)

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75. What phrasal verb means to make something full → lấp đầy bằng? ➥Example: She f_ _ _ ed the glass w_ _ _ water. (synonym: load, pour)

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76. What phrasal verb means to cause something → dẫn đến? ➥Example: The storm r_ _ _ _ _ _ _ i_ flooding. (synonym: cause, lead to)

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77. What noun phrase means how things are not the same → sự khác biệt giữa? ➥Example: There is _ d_ _ _ _ _ _ _ b_ _ _ _ _ _ cats and dogs. (synonym: distinction, contrast)

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78. What noun phrase means a thought or suggestion → ý tưởng về? ➥Example: She gave me a_ i_ _ _ a_ _ _ _the project. (synonym: suggestion, thought)

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79. What noun phrase means several, many → một số? ➥Example: _ n_ _ _ _ r o_ students are absent. (synonym: some, several)

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80. What noun phrase means the explanation of why → lý do cho? ➥Example: There is _ r_ _ _ _ _ f_ _ his delay. (synonym: cause, justification)

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81. What noun phrase means a kind or category → loại? ➥Example: This is _ t_ _ _ _ o_ fruit. (synonym: kind, category)

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