—I'm afraid you have the wrong number.
—Sorry！________.
A.See you later B.I didn't know that
C.Hold on，please D.I hope I didn't bother you
Directions: Write an English composition in 120-150 words according to the instructions given below in Chinese.
随着移动网络的发展，各种手机APP应运而生，给我们的生活带来了极大便利，但许多同学也因此沉迷网络。现学生会发起一项清理手机APP的倡议，如果你只能从以下四个APPs：Wechat，Taobao，E-dictionary，Glory of Kings (mobile game)中保留两个，你会如何选择，并说明理由。
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Directions: Translate the following sentences into English, using the words given in the brackets.
1.面对紧急情况时，他是多么的冷静啊！ (How)
2.致力于保护濒临灭绝的海洋生物，人人有责。 (commit)
3.看到挂满枝头鲜红嫩绿的果实，他们不禁心生欢喜。(can’t help)
4.当政府开始号召人们进行垃圾分类时，人们才意识到这是迈向保护环境的重要一步。(Only)
Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible.
Lower Oxygen Levels Threaten Marine Life
Oxygen in the oceans is being lost at an alarming rate, with “dead zones” expanding rapidly and hundreds more areas showing oxygen dangerously exhausted, putting sharks, tuna, marlin and other large fish species at particular risk. Dead zones, where oxygen is effectively absent, have quadrupled(翻两番) in extent in the last half-century, and there are also at least 700 areas where oxygen is at dangerously low levels, up from 45 when research was undertaken in the 1960s.
The reasons behind this environmental collapse are multiple. Among all, pollutants generated by the industrial world have been the most destructive force to cause the unbalance, including a rising tide of plastic waste, as well as other pollutants. Seas are about 26% more acidic than in pre-industrial times because of absorbing the excess carbon dioxide in the atmosphere, according to the Intergovernmental Panel on Climate Change, with damaging impacts on shellfish in particular.
Low oxygen levels are also associated with global heating, because the warmer water holds less oxygen and the heating causes stratification(分层), so there is less of the vital mixing of oxygen-rich and oxygen-poor layers. Oceans are expected to lose about 3-4% of their oxygen by the end of this century, but the impact will be much greater in the levels closest to the surface, where many species are concentrated, and in the mid to high latitudes.
Another major cause for lower oxygen is intensive farming. When excess artificial fertilizer from crops, or wastes from the meat industry, runs off the land and into rivers and seas, it feeds algae(藻类) which bloom and then cause oxygen consumption as they die and decay.
The problem of dead zones has been known about for decades, but little has been done to tackle it. Now is high time to take actions and help the oceans function better.
Directions: After reading the passage below, choose the best answers from the six statements according to what you have just read.
The price of a piece of history
A fresh lemon can be purchased for less than $1. But in 2008, Cowan's Auctions in Cincinnati sold a lemon blackened with age for $2,350.
What was so special about this lemon? 1. According to a handwritten note in ink attached to a partly sealed bottle containing the lemon, the fruit was picked in May 1842 by Washington's "old gardener" some 43 years after the first president's death
Two thousand dollars is a lot to pay for produce, even from the estate of a founding father. This sale, however, just might be considered a bargain compared with prices paid for other historical collectibles in recent years. 2.
Collecting a piece of history, or an object associated with a famous person, is not brand new. Ordinary objects with extraordinary stories have increasingly been coming to auction and achieving high prices, says Thomas Venning, director of Christie's department of books and manuscripts in London. Prices are being driven up, he says, by collectors in the U.S. and, increasingly, in Asia. The Hawking wheelchair, for example, was purchased by a private museum in China.
3. For one thing, their history of ownership is both crucial and sometimes difficult to prove. Photographs of the famous person with the object, as well as documentation (such as letters, diaries or recollections by acquaintances referring to the object) can also help. 4. To evaluate the value of a Picasso painting, one can look at recent prices paid for other Picasso paintings of the same period, similar size or style. Finding another recent sale of a lemon planted by George Washington is a different matter.
Katie Horstman, head of Cowan's American History department, says she could find no comparable items for the lemon as she prepared the piece for its auction. Ms. Horstman nevertheless eventually arrived at the estimated value at $3,000 to $4,000, she says, by researching auction records for objects somehow associated with Washington that had appeared on the market.
Cowans ended up estimating the value of the lemon at $3,000 to $4,000, according to description on its website. Objects associated with Washington these days, Ms. Horstman says, can sell for anywhere from 1,000 up to tens of thousands of dollars.
A. Stephen Hawking’s wheelchair fetched 296, 750 at a sale at Christie's in London last November.
B. Yet determining potential values of such objects isn't easy.
C. It was said to be from a tree planted by George Washington at Mount Vernon.
D. The auction result surely drew the attention from both the business and economics worlds.
E. The uniqueness of many of these objects further complicates efforts to put a value on them.
F. Therefore the unique value of many objects proved the worth of collection.
Archaeologists used DNA taken from a broken clay pipe stem found in Maryland to build a picture of an enslaved woman who died around 200 years ago and had origins in modern-day Sierra Leone. One researcher called the work “a mind-blower.”
“In this particular context, and from that time period, I think it's a first,” team member Hannes Schroeder told The Washington Post. “To be able to get DNA from an object like a pipe stem is quite exciting. Also it is exciting for descendant(后裔) communities... Through this technology, they're able to make a connection not only to the site but potentially back to Africa.”
The pipe stem was found at the Belvoir plantation in Crownsville, Maryland, where enslaved people lived until 1864 and where a likely slave cemetery was recently found. DNA taken from the pipe linked back to a woman either directly from or descended from the Mende people, who lived in west Africa, in an area now part of Sierra.
Julie Schablitsky, the chief archaeologist with the Maryland state highway administration, told The Post the discovery, based on saliva(唾液) absorbed into the clay pipe, was a “mind-blower”. She also said records show the existence of a slave trade route Sierra Leone to Annapolis, plied(定期往来) by British and American ships. "As soon as people stepped on those slave ships in Africa," she said, “whether they were from Benin or whether they were from Sierra Leone, wherever they were from, that identity was lost. Their humanity is stripped from. Who they are as a people has gone.”
The new analysis is part of ongoing research around Belvoir that has given descendants of the people enslaved there new insight into the lives of their ancestors. Speaking to The Post, Nancy Daniels, a genealogist from Laurel, Maryland, who thinks she is a descendant of enslaved families from Belvoir but was not linked to the research on the pipe, called the discovery “overwhelming.” “I'm sitting here about ready to cry,” she said. “I'm sorry. I'm so happy ... Thank God for the DNA.”
This year, events and ceremonies are being held to mark the 400th anniversary of the arrival of the first enslaved people in America, at Jamestown, Virginia, in 1619. Slavery was effectively abandoned in the US on 1 January 1863, with the issue by Abraham Lincoln of the Emancipation Proclamation. It formally ended in December 1865, after the civil war, with the approval of the 13th amendment(修正案).
1.What does the phrase “a mind-blower” in paragraphs 1 and 4 refer to?
A.A surprise B.A confusion
C.An excitement D.A fascination
2.According to Hannes Schroeder, the pipe stem was of great significance because________.
A.it was the first direct evidence that slaves living in Maryland were originally from Africa.
B.it helped the archaeologists to draw a portrait of the enslaved woman.
C.it might contribute to identifying the birthplace of the descendant communities.
D.it contained genic clues to the ancestral background of its owner.
3.What can be inferred from the passage?
A.The owner of the pipe once lived in what is now an area in west Africa.
B.The history of slavery in America is an ongoing topic of concern.
C.African slaves lost their identities when they arrived at the Belvoir plantation.
D.Nancy Daniels, a genealogist was sorry for not being involved in the research.
4.Which of the following is the best title for the passage?
A.DNA from an old pipe throws lights on the origins of the enslaved
B.A new research reveals the origins of enslaved African woman
C.The descendants of enslaved people seek their identities
D.DNA contributes to the breakthrough of a new research
