40．I don’t remember how many years ago_______...

40．I don’t remember how many years ago_________people began to grow pine apples here.

高三英语单项填空简单题查看答案及解析

I don’t remember how many years ago ____ I last showed you around the old campus.

A. it was that　　　　　　　　　 B. was it that　　　　　　　　　 C. it was which　　　　　　　　　 D. was it when

高三英语单项填空中等难度题查看答案及解析

All the people in the nation can remember exactly how many years ago _______ the civil war broke out.

A. was it that       B. it was when      C. it was that        D. was it when

高三英语单项填空简单题查看答案及解析

All the people in the nation can remember exactly how many years ago _______ the civil war broke out.

A. was it that       B. it was when      C. it was that        D. was it when

高三英语单项填空中等难度题查看答案及解析

I don’t remember how many years ago ______________I paid my last visit to the principle of my primary school.

高三英语单项填空简单题查看答案及解析

I still remember how many years ago ________I last met her in the countryside．

A．when it was      B．was it that      C．when was it      D．it was that

高三英语单项填空简单题查看答案及解析

Do you still remember how many years ago_________ we first met on campus?

A. was it that　　　　　　　　　　 B. it was that

C. was it when　　　　 　　　　　 　 D. it was when

高三英语单项填空中等难度题查看答案及解析

C

Not many years ago, some American farmers began to complain about hawks(鹰). The hawks were killing chickens. The farmers did not know what to do. They went to the government officials and asked for help.

The officials said, “ We’ll pay you for each hawk you kill.” The farmers began to kill the hawks. Many hawks were killed, but the farmers now had another problem. The field mice were growing in number and they were eating up the farmers’ corn. Hawks eat not only chickens but also field mice. They eat more field mice than chickens. But if the farmers had known that, they would not have upset(打乱) the balance of nature. In one part of the USA, there are deer which eat a kind of wild rose. The deer are eaten by mountain lions. The number of deer, mountain lions, and wild rose does not change much if people stay away from them. If there are too many deer, mountain lions will increase rapidly in number and kill many deer. If there are too many mountain lions, there will be fewer deer and there will be more roses.

It is always necessary for us to keep the balance of nature. The government once killed almost all the mountain lions to protect the deer. Soon there were so many deer that they ate up all the wild roses. Then they began to eat the green leaves of young trees which were important to the farmers.

So the farmers protected their trees from the deer. The deer had nothing to eat, and many of them died.

The government learned a valuable lesson from nature.

44. What had happened after the hawks were killed?

A. People wouldn’t worry about their chickens.

B. The number of the field mice became too large.

C. The number of the field mice became small.

D. The field mice were eating up the farmers’ corn.

45. Why did American people have to protect their trees?

A. Because the mountain lions destroyed the trees.

B. Because there were so many deer that they began to eat the green leaves.

C. Because they wanted the trees to grow well.

D. Because the trees are more important than the deer.

46. What can we learn from the article?

A. We must keep the balance of nature.

B. We must not kill any animals.

C. we must feed the hawks with our corn to keep the balance of nature.

D. Both A and B.

高三英语阅读理解简单题查看答案及解析

How and why, roughly 2 million years ago, early human ancestors evolved large brains and began fashioning relatively advanced stone tools, is one of the great mysteries of evolution. Some researchers argue these changes were brought about by the invention of cooking. They point out that our bite weakened around the same time as our larger brains evolved, and that it takes less energy to absorb nutrients from cooked food. As a result, once they had mastered the art, early chefs could invest less in their digestive systems and thus invest the resulting energy savings in building larger brains capable of complex thought. There is, however, a problem with the cooking theory. Most archaeologists (考古学家）believe the evidence of controlled fire stretches back no more than 790,000 years.

Roger Summons of the Massachusetts Institute of Technology has a solution. Together with his team, he analyzed 1.7 million-year-old sand-stones that formed in an ancient river at Olduvai Gorge in Tanzania. The region is famous for the large number of human fossils (化石) that have been discovered there, alongside an impressive assembly of stone tools. The sand-stones themselves have previously yielded some of the world’s earliest complex hand axes — large tear-drop-shaped stone tools that are associated with Homo erectus (直立人) . Creating an axe by repeatedly knocking thin pieces off a raw stone in order to create two sharp cutting edges requires a significant amount of planning. Their appearance is therefore thought to mark an important moment in intellectual evolution. Trapped inside the Olduvai sand-stones, the researchers found distinctive but unusual biological molecules（分子）that are often interpreted as biomarkers for heat-tolerant bacteria. Some of these live in water between 85°C and 95°C. The molecules’ presence suggests that an ancient river within the Gorge was once fed by one or more hot springs.

Dr. Summons and his colleagues say the hot springs would have provided a convenient “pre-fire” means of cooking food. In New Zealand，the Maori have traditionally cooked food in hot springs, either by lowering it into the boiling water or by digging a hole in the hot earth. Similar methods exist in Japan and Iceland, so it is plausible, if difficult to prove, that early humans might have used hot springs to cook meat and roots. Richard Wrangham, who devised the cooking theory, is fascinated by the idea. Nonetheless, fire would have offered a distinct advantage to humans, once they had mastered the art of controlling it since, unlike a hot spring, it is a transportable resource.

1.All of the following statements can support the cooking theory EXCEPT__________.

A.cooking enabled early humans to invest less in digestive system

B.cooking enabled early humans to devote more energy to building big brains

C.our brain became larger around the same time our digestive system weakened

D.the controlled fire wasn’t mastered until about 790,000 years ago

2.The presence of biological molecules was important because_________.

A.they suggested a possible means of cooking without fire

B.they cast light on how early Homo erectus lived

C.they provided a convenient way of studying stone tools

D.they made studies of pre-historic cultures possible

3.The underlined word “plausible” probably means _________.

A.noticeable B.applicable

C.reasonable D.affordable

4.What may be the conclusion of the study by Dr. Summons and his colleague?

A.Early humans were capable of making complex stone tools.

B.Hot springs help explain how human brains got so big.

C.Homo erectus were adaptable to tough and complex territories.

D.Human brains are highly advanced as shown by their size.

高三英语阅读理解困难题查看答案及解析

I still remember _______ the grand school used to be a abandoned airport two years ago.

A. how　　 　　　　　　　 　 　 B. where

C. when　 　　　　　　　　 　 D. why

高三英语单项填空中等难度题查看答案及解析