题目内容
【题目】 Albert Einstein was born in 1879. As a child, few people guessed that he a famous scientist whose theories would change the world.
A. has been B. had been
C. was going to be D. was
【答案】C
【解析】
试题分析：句意：爱因斯坦出生于1879年，小的时候很少人猜到他将会成为一个伟大的科学家，他的理论将会改变全世界。根据句意，应该是表达过去将来时，所以只有C选项符合。该选项是使用过去进行时表将来。A选项是现在完成时（用以表达过去的动作对现在的影响，往往有一些关键的词比如说since或者是for加一段时间），B选项是过去完成时(具备的条件是有两个动词，而且其中一个动作要在另一个动作之前发生，那么这个之前发生的动词就使用过去完成时)，C选项是过去进行时（过去进行时表示过去某一此刻正在进行的动作，另外动词going的进行时还可以表达将来），D选项是过去时（表达过去的动作）。结合以上的表述以及后句使用的情态动词would（will 的过去时，用于过去将来时），分析可知答案就是C。
【题目】根据短文内容，从下框的A-F选项中选出能概括每一段主题的最佳选项，并在答题卡
上将该选项涂黑。选项中有一项为多余选项。
A. Careful biological research B. The information of global warming C. Solution to the terrifying result D. Greater danger of extinction E. Examples of species in danger of extinction F. A shocking report |
【1】
The earth is getting warmer. People burn coal, oil and gas and this produces carbon dioxide, methane (沼气) and nitrous oxide. These gases, called “greenhouse gases”, prevent the heat of the sun from leaving the earth’s upper atmosphere and this makes the earth warmer.
【2】
A few weeks ago a group of scientists produced a report about global warming and the natural world. They wanted to find out if global warming was dangerous for plants and animals. According to what they found, the scientists say that during the next 50 years about 25% of land animals and plants will become extinct. More than a million plant and animal species will be extinct by 2050.
【3】
More than 10% of all plants and animals will become extinct. It is too late to save many plants and animals because of the greenhouse gases that are already in the atmosphere. But the scientists say if we control greenhouse gases now, we could save many more plants and animals from extinction.
【4】
The scientists studied some regions of the world with a very rich biology. These regions were Europe, Australia, Central and South America and South Africa. Their studies showed that species living in mountainous areas had a better chance
【5】
The scientists found that half of the 24 species of butterflies they studied in Australia would soon become extinct. 60% of the species in the Kruger National Park in South Africa would also die out, and more than 100 of the 300 South Africa plant species they studied would also become extinct. One of the plants in danger of extinction is the national flower of South Africa, the King Protea. They studied 163 tree species in the Cerrado region of Brazil and found that 70 would become extinct. Many of the plants and trees that live in this region live nowhere else in the world. In Mexico, they studied 1,870 species and found that more than 30% of these were in danger of extinction.