Walk through the Amazon rainforest today and you will find it steamy, warm, damp and thick. But if you had been there around 15,000 years ago, during the last ice age, would it have been the same? For more than 30 years, scientists have been arguing about how rainforests might have reacted to the cold, dry climate of the ice ages, but till now, no one has reached a satisfying answer.

Rainforests like the Amazon are important for mopping up CO2 from the atmosphere and helping to solve global warming. Currently the trees in the Amazon take in around 500 million tons of CO2 each year: equal to the total amount of CO2 given off in the UK each year. But how will the Amazon react to the future climate change? If it gets drier, will it survive and continue to draw down CO2? Scientists hope that they will be able to learn in advance how the rainforest will manage in the future by understanding how rainforests reacted to climate change in the past.

Unfortunately, collecting information is incredibly difficult. To study the past climate, scientists need to look at fossilized pollen（花粉）kept in lake mud, Going back to the last ice age means drilling down into lake sediments（沉淀物）, which requires specialized equipment and heavy machinery. There are very few roads and paths, or places to land helicopters and aeroplanes. Rivers tend to be the easiest way to enter the forest, but this still leaves vast areas between the rivers completely unsampled（未取樣）. So far, only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon forest reacts to climate change.

1.How do scientists study the past climate change?

A. By predicting the climate change in the future.

B. By drilling down deep into land sediments.

C. By analyzing fossilized pollen in lake mud.

D. By taking samples from rivers in the Amazon.

2.Why is it difficult to collect information about the past climate change?

A. Because scientists can't find proper equipment and machinery.

B. Because it is very difficult to obtain complete samples.

C. Because helicopters and aeroplanes have no place to land.

D. Because none of the cores provide any information.

3.Where is the passage most probably taken from?

A. A medical journal. B. A news report

C. A travel brochure. D. A science magazine.

4.The best title for the text may be .

A. Secrets of the Rainforest

B. Climates of the Amazon

C. The History of the Rainforest

D. Changes of the Rainforest

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By 9：00 am, there were nine of us in the garden picking tomatoes, beans, okra and squash. By 10：00 am, there was lots of laughter. We shared a lot of stories. By 5：00 pm, everyone was a little drunk from the wine and beer. After dinner, we played games. As we were leaving, Happy and Ben handed each of us a shopping bag filled with the bounty(大量給予之物) of the day, already packaged and frozen. What a delightful gift!

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B. sometimes quarrel with each other

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B. It was wonderful.

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When you’re a parent to a young child, you spend a lot of time talking about feelings: about having to share, about being disappointed because you may not have a cookie instead of broccoli (綠花椰菜), about the great injustice of a parent pressing the elevator button before the child has a chance to.

And in a parenting culture that’s increasingly concerned with centering children’s needs above all else, mothers and fathers have become skillful at talking about their kids’ feelings while masking their own. But new research suggests that parents who hide their negative emotions are doing their children, and themselves harm.

A study published this month says that when parents put on a faux-happy (假開(kāi)心) face for their kids, they do damage to their own sense of wellbeing and authenticity.

“For the average parent the findings suggest when they attempt to hide their negative emotion expression and overexpress their positive emotions with their children, it actually comes at a cost: doing so may lead parents to feel worse themselves,” researcher Dr Emily Impett, says.

It makes sense that parents often fall back on amping up (擴(kuò)大) the positivity for the sake of their children—there are a lot of things in the world we want to protect our kids from. But children are often smarter than we expect and are quite in tune with what the people closest to them—their parents—are feeling.

There was a time about a year or so ago, for example, when I received some bad news over the phone; I was home with my four-year-old and so I did my best to put on a brave face. She knew immediately something was wrong though, and was confused.

When I finally let a few tears out and explained that Mom heard something sad about a friend, she was, of course, just fine. My daughter patted my shoulder, gave me a hug, and went back to playing. She felt better that she was able to help me, and the moment made a lot more sense to her emotionally than a smiling mom holding back sobs. I was glad that I could feel sad momentarily and not have to work hard to hide that.

Relaying positive feelings to your children when you don’t feel them is a move the researchers called high cost — that it may seem like the most beneficial to your child at the time but that parents should find other ways of communicating emotions that “allow them to feel true to themselves”.

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1.What is the typical behavior of parents when they bring up their children?

A. Allowing their children chances to do things themselves.

B. Expressing their dissatisfaction with their children.

C. Hiding their true emotions from their children.

D. Sharing their favorite food with their children.

2. If parents put on a faux-happy face, _______.

A. their children will be protected

B. their children will be taken in

C. they will feel happy as a result

D. they will undergo worse feelings

3.The author mentioned the example of her daughter to illustrate ______.

A. children are not so clever as parents think

B. children can often understand parents’ true feelings

C. it’s meaningful for parents to always look positive

D. it’s necessary to expose children to harmful things

4. We can conclude from the passage that _______.

A. protecting children from age-inappropriate things is important

B. it makes sense for children to know their parents’ negative feelings

C. children will admire their parents more because of being protected

D. separation from negative feelings helps children see the world honestly

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