题目内容

The Creat Wall winds its way from west to east, deserts, mountains, __ valleys, till at last it reaches the sea.

A.
over; across; across
B.
through; past; past
C.
across; over; through
D.
past; through; over

C
沙漠是大片大片的，经过时是从其表面穿过，用across；从山的一边到另一边的翻越用over；山谷是中间低两边高的，从其内部穿过用through。

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相关题目

The Creat Wall winds its way from west to east, ______ deserts, ______ mountains, ______ valleys, till at last it reaches the sea.

[　　]

A．over; across; across

B．through; past; past

C．across; over; through

D．past; through; over

Lichens (地衣) are difficult to see. They don’t move. They often mix into the living place. You might not even recognize one if you are looking right at it.

Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms (微生物) almost everywhere — from deserts to rainforests, and from Antarctica to Africa. They’ve traveled in outer space, and some scientists think there might even be lichens on Mars.

What you probably don’t realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus (菌类) and an alga (藻类). Neither of these organisms is a plant, so the lichen isn’t a plant either.

Through photosynthesis (光合作用), the alga gets the sun’s energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus.

Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world.

Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment.

What do we know about lichens according to the passage?

A. They will die if they leave Earth.

B. There are more lichens than plants on Earth.

C. They look similar to the environment around them.

D. They are too small to be easily seen by people.

What does the second paragraph mainly talk about?

A. The way lichens live.

B. The natural environment of lichens.

C. The way lichens work as organisms.

D. The family tree of lichens.

Which of the following statements is NOT the scientists’ purposes of studying lichens?

A. To understand basic facts about them.

B. To creat a lichen family tree.

C. To understand how lichens are related to each other.

D. To understand why lichens can live in different places.

We can know from the passage that __________.

A. lichens can be used to better understand the environment

B. lichens don’t have any differences in colors or sizes

C. lichens don’t use photosynthesis like a green plant

D. scientists have discovered every kind of lichen

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。
Time, a faithful company of our life, is a universal topic. People are always curious about what it is, how it travels and who it meets.
Stephen Hawking, one of the world’s smartest physicists, once said. “I’m fascinated by time.”
Many of us are, and the popularity of time travel novels, movies and TV series has proved that. After Palace and Startling by Each Step achieved astonishing ratings last year, Palace 2 aired on January 20, attracting time travel fans back to TV.
Woody Allen’s movie Midnight in Paris achieved great success. It was nominated for Best Picture, Directing, Original Screenplay and Art Direction for the 2012 Academy Awards.
Dream of heroism
Time travel TV series and movies connect both today and the past, thus offering room for imagination. Imagination creates a chance for the young to fulfill a dream that is hard to achieve in reality.
Chinese writer Xi Juan is a pioneer of time-travel stories in China. In 1993 she published a love story about a young woman time traveling to ancient times. The leading role’s modern personality and perception of love help her win the heart of a cool, handsome martial art master. Such a plot satisfies female fans’ love fantasy.
Starting from the late 1990s, novels about men traveling back to the past prevailed (盛行), with a Step into the Past as the most popular example. In these stories, the male leading roles accomplish great things with their modern skills and wisdom.
It is usually “a dream of heroism come true”, along with enviable romances.
Eye candy
“I’m hooked by the shows because they are characterized by dramatic and poetic love and have eye-pleasing actors,” Xia Xiaoyan, who works for a foreign-owned enterprise in Shanghai, explained her love for time travel TV series.
Her comment echoes a 2011 survey by Creat Marketing Research Co Ltd in China. When asked about what is so appealing about time travel TV series, 21 percent of respondents answered, “These attractive characters.”
A bigger reason behind the popularity of time travel stories, however, is the relaxation they offer, according to the survey.
Cai Yinong agrees. “Many people are facing tremendous pressure in their fast-paced lives, so this genre is more relaxing than other shows as it provides people with a terrific outlet to escape reality,” Cai told China Daily.
Cultural homesickness
“Which dynasty would you like to live in if you could travel to the past?” asked a survey launched by Shanghai University and Shanghai Social Sciences Association last December.
About 60 percent of the 2,543 respondents chose Tang Dynasty, while Qing Dynasty, and the Spring and Autumn and Warring States periods were the other top two destinations.
The survey results reflects people’s definition of the good days: prosperous economy and culture, steady society, fair and uncorrupted politics, and opening up to the outside world.
As for the movie Midnight in Paris, it features modernity versus cultural homesickness. The New York Times commented, “The past seems so much more vivid, more substantial, than the present. The good old days are so attractive because we were not around, however much we wish we were.”

Time travel wins fans
Phenomenon	Stephen Hawking shows great interest in【小题1】___________. People prefer 【小题2】__________ time travel movies and TV series. Woody Allen was 【小题3】_________ in his time travel movie.
Reasons for its 【小题4】______	Supporting details
Dream of heroism	Chances are offered for the young to fulfill 【小题5】__________ hard to achieve in reality. Xi Juan’s 1993 love story 【小题6】________ a young woman traveling to ancient times, which satisfies females fans. From the late 1990s, novels about 【小题7】________ traveling back to the past became increasingly popular. The male leading role in A Step Into the Past travels back to the past to fulfill great things by using his 【小题8】_______ skills and wisdom.
Eye candy	Attractive actors and travel stories make viewers under pressure 【小题9】_________.
Cultural homesickness	Most respondents chose to live in a certain dynasty for: Prosperous economy and【小题10】_________; Steady society; Fair and uncorrupted politics Opening up to the outside world.