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_____ food is hard to find, few birds remain throughout the year.
A．What
B．Which
C．Where
D．That
高一英语单项填空困难题查看答案及解析
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Living in the wild can be hard．Finding food and staying safe aren't easy．Each day, animals try to survive in their habitats．Not all animals get by on their own. Some animals form a close partnership with other kinds of animals．These pairings are called symbiotic(共生的)relationships．
In a symbiotic relationship, the animals depend on each other．One animal helps the other meet its needs．Sounds good, right? Not always．Some animals are not very kind to their partners．In some cases, one animal meets its needs but hurts its partner．Take ticks(扁虱), for example．These insects suck blood to live．To get blood, they attach themselves to other kinds of animals．Ticks can pass germs（细菌）that cause disease instead of helping their hosts．
In other relationships, animals don't treat their partners so poorly．Both animals benefit from living with the other animal．
Small animals called cleaner shrimps(清洁虾）have found a way of helping fish．As their name suggests, the shrimps clean the fish．They hang out at what scientists call a cleaning station．A fish stops by．Then a shrimp climbs onto the fish and even steps into the fish's mouth．The shrimp uses its tiny claws to pick stuff off the fish's body．That can include dead skin and tiny pieces of food that can hurt the fish．The fish gets a nice cleaning．The shrimp enjoys a tasty meal of fish trash．
Small birds called plovers（灰斑）are also in the cleaning business．They have big customers-crocodiles.Crocodiles have long noses filled with sharp teeth. Cleaning them is funny. When a crocodile opens its mouth, the plover hops right in．It lets the plover eat small, harmful animals attached to the crocodile's teeth．The plover gets an easy meal while the crocodile gets clean teeth．
1.The text is mainly about ________．
A. the hard life in the wild
B. some dangerous animals
C. animals living together
D. animals in a symbiotic relationship
2.According to the text, in a symbiotic relationship, ________．
A. animals depend on each other
B. birds depend on animals for food
C. both sides can get help
D. not all animals treat their partners well
3.According to the text, it can be inferred that ________．
A. living in the wild can be simple
B. different animals have different living ways
C. crocodiles mainly live on plovers
D. ticks are useful to some animals
高一英语阅读理解中等难度题查看答案及解析
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___________ seems hard to believe is that the bird the officer uses is the same bird often seen in public parks----the pigeons.
A. What B. Whatever
C. Which D. That
高一英语单项填空中等难度题查看答案及解析
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Unemployment in USA is ________ to remain high in 2010, and possibly for the next few years.
A. likely B. necessary C. gradual D. normal
高一英语单项填空简单题查看答案及解析
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—The passage is too hard to understand.
—Yes, ________ it's very short and there are no few words in it.
A. so B. as C. because D. though
高一英语单项填空中等难度题查看答案及解析
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The shop assistant finds it hard to satisfy the girl, for she is too ________ about clothes.
A．particular B．special C．especial D．curious
高一英语单项填空简单题查看答案及解析
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Why does the woman find it hard to deal with Tom?
A. He wears long fair hair. B. He is a troublemaker. C. He has a headache.
高一英语短对话中等难度题查看答案及解析
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_____________by thick bamboo, the cottage is hard to find.
A．Surrounding
B．Surrounded
C．Being surrounded
D．Having surrounded
高一英语单项填空简单题查看答案及解析
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Chinese archeologists were therefore surprised in the 1990s to find the remains of an ancient fortification (筑城) in Liqian，a remote town in Yongchang county on the edge of a desert area，which was strikingly similar to Roman defense structures.
They were even more astonished to find Westernlooking people with green，deepset eyes，long hooked noses and blond hair.
Though the villagers said they had never traveled outside the county，they worshipped bulls and their favorite game was similar to the ancient Romans' bullfighting dance.
DNA tests in 2005 confirmed some of the villagers were indeed of Caucasian origin，leading many experts to conclude they are descendants of an ancient Roman army headed by general Marcus Crassus.
“The‘foreign’origin of the Yongchang villagers，as proven by the DNA tests，does not necessarily mean they are of ancient Roman origin.”
Xie Xiaodong，a geneticist from Lanzhou University，also sounded a skeptical note.
“Even if they are descendants of Romans，it doesn't mean they are necessarily from that Roman army，” Xie said.
Their mysterious identity has brought wealth and fame to some of the villagers.
Cai Junnian has yellow wavy hair，a hooked nose and green eyes.A DNA test in 2005 confirmed he is of 56 percent European origin.It made him famous almost overnight.
Reporters，filmmakers，historians and geneticists from around the world pursued him.A Beijing film producer will spend millions to turn the villagers' story into a film.
Lanzhou University's new research body，set up this week by Chinese and Italian anthropologists，is a platform for experts to further research the subject but the research work will certainly be complicated.
The center will help Chinese learn Italian language and culture，he said.“More exchanges will certainly be helpful in unraveling the mystery.”
1.Scientists take DNA tests in order to ________.
A. explain why villagers have the Westernlooking
B. explain why ancient Roman army disappeared
C. explain why villagers are infected with AIDS
D. explain why villagers married at an early age
2.Which is NOT true according to the passage?
A. Romans like bullfighting dance.
B. The villagers are of ancient Roman origin.
C. The research work will be very complicated.
D. Cai Junnian's European origin makes him famous overnight.
3.What's the meaning of the underlined word“unraveling” in the last paragraph?
A. Keeping. B. Discovering.
C. Storing. D. Destroying.
4.Which of the following would be the BEST title for the passage?
A. Chinese Villagers Descended from Roman Soldiers
B. Unforgettable and Fierce Ancient Roman War
C. Similarities Between Chinese and Western People
D. An Introduction to Roman Defense Structures
高一英语阅读理解中等难度题查看答案及解析
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根据句子要求转换句型（共5小题，每小题2分，满分10分）
1.Xi’an is one of the few cities with city walls. Its walls remain as good as before. (两句合为一句)
Xi’an is one of the few cities __________________________________________.
2.She didn’t spend much time in reaching the standard for entering the Olympic Games. （同义转换）
___________________________________ the standard for entering the Olympic Games.
3.His mother told him not to waste time on computer games. （改为被动句）
___________________________________________________________________
4.By now, the government has spent a lot of money in protecting the old temple. （改为被动句）
____________________________________________________________________
5.And my memory became too large for me to believe it. （同义转换）
And my memory became ____________________________________________.
高一英语其他题中等难度题查看答案及解析