Man has been on the earth about one million years. He_ (manage) to live on every part of the planet, even though some climates have made life difficult. It is thought
(different) in skin color are the result of climatic__
.(adapt). For example, people with skin colors of yellow, red, and olive, generally come from areas
_ they have had to adapt to other climates. Man's size also seems to
(various) according to climate. People living in colder regions are generally larger than
_ living in hotter ones. This difference might be explained_
the fact that big people have less skin compared to weight than do small people. The less skin a person has relative to his weight, the easier
is for him to keep warm. As part of the natural environment, climate greatly affects human activities. Climate has a significant
0n agriculture. Climatic factors restrict the kinds of crops that can be grown. Man changes his living habits in order to adjust to climate, but climate
(change) as well, though more slowly. By learning more about his climate, man will find a way to adapt to or control it and live a more comfortable life.
Global warming could make humans shorter. Scientists claim to have found evidence that it caused the world's first horses （shrink） nearly 50 million years ago. In fact,a team from the universities of Florida and Nebreaks says
has found a link between the Earth heating up and the size of mammals-homes，during the last time the world heated up. The scientists used fossils to follow the evolution of homes from their earliest
（appear) 56 million years ago. As temperatures went up．their size went
. The scientists say that the current warming could have the same effect
mammals and could even make humans
（small）．“Horses started out small，about the size of a small dog. What's
（surprise）is that after they first appeared，they then became even smaller and then dramatically increased in size, and that
（exact）corresponds to the global warming event, followed by cooling.”"It had been known that mammals
small during the last warm time，
we hadn't realized that temperature specifically was driving the evolution of body size”Dr. Bloch said in the "Science”journal.
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In the age of the smart phone, there seems no reason to ask questions about: the weather forecast, a business’s phone number or directions, ______can all be easily found on Google, but very often people
______(actual) ask these things by telephoning. Your answer may
______(reply) to with a thank-you e-mail.
This isn’t the first time that great ______(change) have taken place in our manners due to technology. In the late 1870s, when
______telephone was invented, people didn’t know how to greet a caller. Often there
______(be) just silence. Alexander Graham Bell, the inventor,
______ (suggest) that people say “Ahoy”, but finally“Hello” won out,the greeting is now used
_____everyday face-to-face communications.
Try to be______ (respect) no matter who you communicate with. Just keep it in mind that
______(polite) never goes out of fashion.
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Once there lived a rich man ________ wanted to do something for the people of his town. But first he wanted to find out whether they
_______ (actual) deserved his help.
In the centre of the main road into the town, he placed very large stone. Then he
______(hide) behind a tree and waited. Soon an old man came along with his cow.
“Who put this stone in the centre of the road?” said the old man, but he did not attempt ________ (remove) the stone.
___________,with some difficulty he passed around the stone and continued on his way.
________ man came along and did the same thing; then another came, and another. All of them complained about the stone but nobody tried to remove it. Late in the afternoon a young man came along. He saw the stone,
________ (say) to himself; “The night
_______(be)very dark. Some neighbors will come along later in the dark and will fall against the stone.”
The he began to move the stone. He pushed and pulled with all his _______ (strong)to move it. To his amazement, he found a bag of money under the stone.
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Tuan was a farmer in Vietnam. For decades, he had been struggling to rid his family of hunger.However, it always confused him to expand the output of his crops. This
job.
One day, when skimming through a newspaper, Tuan read comment on Yuan Longping. He underlined Yuan’s nationality and occupation, and then
(focus) on his discovery and the statistics of his research. He found the knowledge Yuan circulated very
(practice). Therefore, he made a summary and began to build up a new farming method. He planted super grain of rich nutrition and equipped
(he) to keep his crop roots free of bacteria and pests. He also enriched minerals in the soil while
(reduce) chemical fertilizers. Though it cost him more time and freedom, he was full of hope.
The next year, Tuan was sunburnt satisfied with his production very much. Thanks to YuanLongping, he not only won the battle
hunger, but he could also export his crops abroad.
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At the end of the 16th century, most of the people_____spoke English lived in England. The language did __
__ begin to be spoken in many other countries until the 17th century. Nowadays, more people speak English than ___
_____ before. However, English __
____(change) over time. The English __
__(speak) in England between about AD 450 and 1150 was based more _
__ German than the English we speak at present. Then from about AD800 and 1150, new settlers who ruled England spoke first Danish and later French. They enriched __
__ English language and especially its vocabulary. ___
_ (gradual), English became less like German. In 1620 some British people moved to America and ___
__ (settle)there. Later in the 18th century some British people __
__(take) to Australia too. English began to be used in both countries.