—I am worn out now. I stayed up last night to finish the report.

—Oh? You ______. The professor asked us to hand it in next week.

A. needn’t have B. wouldn’t have

C. couldn’t have D. can’t have

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The dodo is among the most famous extinct creatures, and a poster child for human-caused extinction events. Despite its bad name, and the fact that the species was alive during recorded human history, little is actually known about how this animal lived, looked, and behaved. A new study of the only known complete skeleton(骨架) from a single bird takes advantage of modern 3-D laser scanning(掃描) technology to open a new window into the life of this famous extinct bird.

The study was presented at the 74th Annual Meeting of the Society of Vertebrate Paleontology in Estrel, Berlin. Leon Claessens, Associate Professor at the College of the Holy Cross, and lead researcher on the study said that, "the 3-D laser surface scans we made of the fragile dodo skeletons enable us to reconstruct how the dodo walked, moved and lived to a level of detail that has never been possible before. There are so many outstanding questions about the dodo bird that we can answer with this new knowledge."

A complete dodo skeleton, found by an amateur collector and barber, Etienne Thirioux, on the island of Mauritius between 1899 and 1917, has remained unstudied, even though it is the only complete dodo skeleton from a single individual bird known to exist. All other skeletons are incomplete combinations, meaning that they are gathered from more than one individual. In addition, Thirioux constructed a second, partially combined skeleton, which contains many bones that also belong to a single bird. "Being able to examine the skeleton of a single, individual dodo, which is not made up from as many individual birds as there are bones, as is the case in all those other combined skeletons, truly allows us to appreciate the way the dodo looked and see how tall or fat it really was," said Juilan Hume, of the Natural History Museum UK, a co-author on the study.

The scans were performed on site in Durban, South Africa, and allow examination of the biology of this mysterious extinct bird in detail for the first time. Using the newest digital tools and techniques, the scans provide an insight into how the flightless dodo may have developed its giant size, and how it walked and lived in its forest home. According to Kenneth Rijsdijk, a biologist from University of Amsterdam, “the skull of the dodo is so large and its mouth so strong that it is easy to understand that the earliest naturalists thought it was related to sharks and other birds of prey（猛禽）, rather than the pigeon family.”

1.The underlined phrase “a poster child” in Para. 1 is closest in meaning to “ ”.

A. a typical example

B. an endangered animal

C. a child who puts up posters on the board

D. a child posted in a newspaper as an advertisement

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A. ways to save the dodo

B. the dodo’s living habits

C. the bird’s natural habitat

D. the cause of the dodo’s extinction

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A. It is gathered from more than one individual.

B. It reminded unstudied between 1899 and 1917.

C. It is the only complete dodo skeleton from a single individual bird.

D. It can be examined with 3-D laser scanning technology.

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A. To call people’s attention to wildlife protection.

B. To criticize humans for the extinction events.

C. To introduce a new way of studying the dodo.

D. To give tips on how to study extinct creatures.

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Shark on the bait （誘餌） !" shouted Andre Harman, pointing to a spot a few yards behind the outboard motors． His voice gave no indication of panic, but the crew suddenly became tense and fixed their eyes on the water． Slowly, smoothly, Andre drew in the bait．The shark followed． No one asked what kind of shark it was． Everything about it, from its color to its shape, tells that it was a great white shark．

Andre lifted the bait aboard． Placing himself between the two motors, he dropped his right hand into the water just as the great head reached the first motor． “My goodness Andre!” I said． His hand seized the big nose, moving it away from the tube of the motor, guiding the shark's head up as it rose out of the water． Andre's hand held the nose, touching it gently． No one spoke． No one breathed． The moment seemed endless． In fact, it lasted less than five seconds before Andre pulled his hand back．

Still nobody spoke． Then Andre smiled and said: "The first time was an accident． I was just trying to move the shark away from the motor． Sharks are attracted to motors by their electrical signals and have a habit of biting them to see if they are eatable． " Andre has worked with great white sharks for years． "My hand landed on its nose, and it sort of paused, so I kept it there, and when I did let go, the shark bit and bit as if it was searching for whatever it was that had attracted it．"

Nearly every encounter （遭遇） we had had with the great whites had been totally illogical． The more we learned, the more we realized how little was really known about them in the past years． Back then, it was generally accepted that great whites ate people by choice． Now we know that almost every attack on a human is an accident in which the shark mistakes a human for its normal food． Back then, we thought that once a great white smelt blood, it would lead to death． Now we know that nearly three-quarters of bite victims survive, perhaps because the shark recognizes that is has made a mistake and doesn't return for a second bite．

1.The author said, "My goodness! Andre ! " when ．

A．Andre was about to fall into the water

B．Andre was about to touch the shark

C．Andre was followed by the shark

D．Andre was bitten by the shark

2.What does the author think of the encounters with great whites?

A． Exciting． B． Educational．

C． Frightening D． Reasonable

3.Most bite victims survive in shark attacks because .

A． they are taught how to fight off sharks

B． sharks discover they are no threats

C． they manage to swim to safety

D． sharks stop attacking them

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