olga was about to say something about the end of the movie. he was stopped by his friends right then

It wasn't obligatory đồ sộ submit my assignment today

A. I must have submitted my assignment today

B. I needn't have submitted my assignment today

C. I could have submitted my assignmenttoday

D. I shouldn’t have submitted my assignment today

Read the following passage and mark the letter Ay B, C, or D on your answer sheet đồ sộ indicate the correct word or phrase that best fits each of the numbered blanks from 25 đồ sộ 29.

Why vì thế some people take revenge on others? Why aren’t we able đồ sộ sort out our problems without seeking đồ sộ get (25)______ with those who have hurt us? Apparently, we are (26)______ experiencing a deeply rooted part of human nature. Our desire for revenge comes from the brain’s limbic system, the most primitive part of the brain and one that we share with all animals. (27)______, when someone confronts us, we often prefer attacking verbally or physically rather kêu ca try đồ sộ work out a solution together.

However, unlike animals, we also possess a highly evolved cerebral cortex which allows us đồ sộ plan and analyse – and this can make revenge more kêu ca just a(n) (28) ______ reaction. A person who feels they have been wronged may even enjoy planning a creative and appropriate act of revenge. Some people suggest that taking revenge can be seen as a positive move, allowing you đồ sộ work through your negative emotions. However, it can also be dangerous, and you may risk finding yourself in a situation (29)______ rapidly gets out of hand

Điền dù 29

A. who 

B. where 

C. when 

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D. which 

Her eyes are red and puffy ______ she has been crying a lot

A. although 

B. since 

C. because of 

D. despite 

Read the following passage and mark the letter A, B, C, or D on your answer sheet đồ sộ indicate the correct answer đồ sộ each of the questions from 35 đồ sộ 42.

Nature has always provided a stimulus for inventive minds. Early flying machines clearly were an attempt to emulate the freedom of birds. Architects and engineers have often consciously modeled buildings on forms found in nature. A more recent example of the inspiration given by nature is the invention of Velcro®. The inventor of this now common fastening device noticed that small burrs attached đồ sộ his dog's coat grasped the hairs by means of tiny hooks. This led him đồ sộ invent a synthetic fabric whose surfaces mimic the clasping properties of this natural seedpod.

Animals and plants have evolved solutions đồ sộ the kinds of problems that often interest engineers and designers. Much current research in material science is concerned with actively examining the natural world, especially at the molecular level, for inspiration đồ sộ develop materials with novel properties. This relatively new field of study is sometimes known as biomimetics, since it consciously attempts đồ sộ mimic nature.

Researchers have investigated several interesting areas. For example, they have studied how the molecular structure of antler bone contributes đồ sộ its amazing toughness, how the skin structure of a worm contributes đồ sộ its ability đồ sộ crawl, how the sea cucumber softens its skeleton and changes shape so sánh that it can squeeze through tiny gaps in rocks, or what gives wood its high resistance đồ sộ impact. These investigations have led đồ sộ several breakthroughs in the development of composite materials with remarkable properties.

Predictions for future inventions that may be developed from these lines of research include so-called smart structures that design and repair themselves in a similar way đồ sộ a variety of processes in the natural world. For example, engineers have envisaged bridges that would detect areas heavily stressed by vehicle movement or wind. The bridge structure would then automatically add or move material đồ sộ the weak areas until the stress is reduced. The same principle might be used đồ sộ repair damaged buildings. Other new materials that have been imagined are substances that would copy photosynthesis in green plants in order đồ sộ create new energy sources. The potential impact of biomimetic research is so sánh great that the twenty-first century may come đồ sộ be known as the "Age of Materials."

As inferred from the passage, what would be the advantage of a product that mimics photosynthesis? 

A. It could be used đồ sộ create green plants

B. It could help đồ sộ meet future energy needs

C. It could be an aid in repairing green areas

D. It could sườn the basis of twenty-first century materials

A scientific principle has a life expectancy of approximately a decade before it drastically revised or replaced by newer information

A. expectancy

B. approximately

C. drastically revised

D. newer

Bodies of ______ dead in the tragic accident yesterday were taken away

A. the 

B. a 

C. an 

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D. Ø