2. 专升本
  3. According to current【C1】______, the world’ s population, which is doubling every 35 years, will be at or near 14 billion【C2】____

According to current【C1】______, the world’ s population, which is doubling every 35 years, will be at or near 14 billion【C2】____

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问题     According to current【C1】______, the world’ s population, which is doubling every 35 years, will be at or near 14 billion【C2】______the year 2030. It is very much doubtful whether the world【C3】______how to feed this population by then. This population will be very much more【C4】______than today. Advanced countries are【C5】______to increase output by a factor of at least five times.【C6】______countries will at least have established extractive industries, backed by roads, airports and power stations, and【C7】______to export in order to be able to pay【C8】______imported food and skills. Technology itself will have become more sophisticated and various.【C9】______, new materials, even harder to dispose of than glass and plastic, will have been invented. New drugs and pesticides with【C10】______side-effects will have been invented. New【C11】______of transport will abound: hovercraft will skim over lakes and commons to【C12】______the silence of winter. A flurry of rocket-belted enthusiasts will leap about like grass-hoppers, while overhead the skip-liners circumnavigating the globe【C13】______five or six hours, will emit their【C14】______booms. More people with more technology【C15】______more pollution, more environmental distortion and【C16】______privacy. Much of the damage will come from the【C17】______which will necessarily by made to feed the ever-increasing number of mouths, and to house their【C18】______The crash of【C19】______timber as forests are felled, will be echoed by the thunder of explosives, as canals and harbours are blasted into【C20】______
【C3】
选项 A、will find out
B、has found out
C、will be finding out
D、will haVe found out
答案D
解析 语法题。句末有提示by then，所以应该用将来完成时。
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