C.It is hardly acceptable.
D.It is completely illegal.
3.From the passage we can know that Poo’s team will .
A.continue to disable a gene on the monkeys
B.try to clone more monkeys and edit their genes
C.find the similarities between humans and monkeys
D.determine the cause of sleep disorders and find cures
4.What’s the main idea of the passage?
A. Chinese effort to clone gene-edited monkeys kicks off.
B. Chinese dream to clone monkeys has finally come true.
C. Cloning monkeys is an important breakthrough in science.
D. Cloning gene-edited monkeys has caused some moral risks.
We are obsessed (迷恋)with ourselves.We study our history, our psychology, our philosophy.Much of our knowledge revolves (使旋转)around humankind itself, as if we were the most important thing in the universe.
But in the course of the centuries we have come to realize just how many wrong ideas we’ve had.We have learned of the existence of black holes, waves of space, and of the extraordinary molecular structures in every cell of our bodies.
The more we discover, the more we understand that what we don’t yet know is greater than what we know.The more powerful our telescopes, the stranger and more unexpected are the heavens we see.The closer we look at the minute detail of matter, the more we discover of its profound structure.
In a famous story told by Plato in the seventh book of The Republic, some men are chained at the bottom of a dark cave and see only shadows cast upon a wall by a fire behind them.They think that this is reality.One of them frees himself, leaves the cave and discovers the light of the sun and the wider world.At first the light, to which his eyes are unaccustomed, stuns and confuses him. But eventually he can see and returns excitedly to his companions to tell them what he has seen.They find it hard to believe.
We are all in the depths of a cave, chained by our ignorance, our prejudices, and our weak senses reveal only shadows.If we try to see further, we are confused: we are unaccustomed. But we try.This is science.Scientific thinking explores and redraws the world, gradually offering us better and better images of it, teaching us to think in ever more effective ways.Its strength is its capacity to demolish (推翻)old ideas, to reveal new regions of reality, and to construct new, more effective images of the world.This adventure rests upon the entirety of past knowledge, but at its heart is change.
The incompleteness and the uncertainty of our knowledge, hung over the abyss (深渊) of what we don’t know, does not make life meaningless: it makes it interesting and precious.
1.What does the author want to tell us in the first three paragraphs?
A.The new discoveries of the universe prove to be wrong.
B.Man has created splendid cultures in the course of centuries.
C.Our knowledge of the universe is incomplete and uncertain.
D.The existing technologies are enough for further exploration.
2.The story told by Plato is meant to .
A.make us aware of the cruelty of reality
B.encourage us to explore the unknown world
C.applaud the heroic deeds of chasing freedom
D.justify our ignorance and prejudice about the world
3.What does the author want to stress in the passage?
A.Exploring the universe makes our life meaningful.
B.Leaving things as they are makes our life perfect.
C.New discoveries of the universe will cause confusion.
D.Past knowledge prevents us constructing a new world.
It was 20xx, and somewhere on a cassava (木暑)and banana farm in rural Tanzania, there were four of us standing in a circle: me, two farmers named Joyce and Elijah, and the former secretary general of the United Nations，Kofi Annan.
Elijah and Joyce did most of the talking.They told us how this farm was unlike any they had worked on; how there were improved crop varieties and new tools to process the harvest.There was even a daycare centre near the farm.This way, women could spend more time selling what they grew* I rattled off (不假思索地说出)some questions. Do you sell your cassava only here一or do you ship it somewhere else? How far is the market? Have you seen a difference in your yields? Kofi, though, mostly listened.
Later, after we left the fields and walked towards the daycare centre where there was a bigger crowd, Kofi started talking.He was telling jokes, trying to put everyone at ease, and doing a very good job of it.The man had the deepest, most infectious laugh I’ve ever heard and an incredibly commanding voice.He sounded like an actor playing himself.
Kofi and I had attended a lot of the same UN events, and he’d visited our foundation’s offices in Seattle a few times, so I’d seen him charm a room before. But this day on the cassava farm was different.He was completely at home here.I suppose I shouldn’t have been surprised: Kofi Annan, of all the world leaders I had met, had spent the most time thinking about how to help places like this farm and people like Joyce and Elijah.
When my husband Bill and I started our foundation in 20xx，we still had so many questions about the best ways to fight poverty and disease, and Kofi, it seemed, already had the answers.That year, he’d written a manifesto (宣目)about the UN’s role in the 21st century.In its final pages, he’d included a set of targets around poverty and disease reduction that he wanted the world to achieve by 20xx.These became known as the Millennium Development Goals (M DG), and at first, critics dismissed them immediately. Cut extreme poverty in half? Stop the spread of HIV, malaria and T B, the three greatest killers in poor countries? At best, it was overly optimistic.
Kofi wasn’t satisfied with just setting the goals, though.He wanted to push the world to achieve them.No other secretary general was so able to connect the UN’s heart with its brain, its mission to lift up the sick and the poor with an effective plan for doing so.He was a master，too, at bringing world leaders along for the ride.
Today, there are 27 million people alive who would have otherwise died from HIV-related illness, T B or malaria And they live, in large part, because Kofi gathered the world to establish the Global Fund, which pays for medicines and things that prevent those diseases from spreading, such as mosquito nets.The world met its goal of halving the global poverty rate by 20xx; in fact, it did so five years ahead of schedule, in 20xx.“ Development experts，” one observer wrote, “are still rubbing their eyes.
When he received the Nobel Peace Prize in 20xx，Kofi said that “today’s real borders are not between nations, but between the powerful and powerless”.He saw Africa’s small farmers as part of the latter camp and wanted to give them a way to lift themselves out of poverty.This was what led us to that cassava farm back in 20xx.