题目内容
（请给出正确答案）
It can be hard to live up to one's______.
A．enjoyment
B．evaluation
C．appreciation
D．reputation
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更多“It can be hard to live up to one's______.A．enjoymentB．evaluationC．appreciationD．reputation”相关的问题
A．has to be
B．will be
C．must be
D．could be
A．Students never criticize or question what the lecture says.
B．Lecturers are almost like God.
C．He gets used to practical thinking.
D．Practical thinking is hard for him.
听力原文： When men first lived on the earth a long time ago, they had no proper place to live in. In order to get away from the heat of the sun, to keep themselves warm and dry, they found caves. Caves really gave them some kind of help. Some of these early men built their shelters up in the tree to escape wild animals. They had a hard life and had to go about from place to place for food. Much later on, their lives began to change. They learnt how to keep animals in herds. As they had to move their herds of animals from place to place for grassland, they had to build shelters which were easily carried about.
When they finally learnt the art of farming, they had to clean forests and started planting crops. After that, they had to think about building more permanent shelters. Old houses were built at first with wood and they even use grass as roofs. This went on for a long time. They kept making their houses better. Today, houses of all kinds are built. They are strong, permanent and can last a very long time.
(30)
A．To get away from the heat of the sun.
B．To keep themselves warm.
C．To get away from the rain.
D．To keep themselves dry.
Concrete is also a climate-change villain. It is made by mixing water with an aggregate, such as sand or gravel, and cement. Cement is usually made by heating limestone and clay to over 2,500 degrees F. The resulting chemical reaction, along with fuel burned to heat the kiln, produces between 7% and 10% of global carbon-dioxide emissions. “When we have to repeatedly regenerate these materials because they’re not durable, we release more emissions,” says Victor Li who has created a concrete suffused by synthetic fibers that make it stronger, more durable, and able to bend like a metal. Li’s creation does not require reinforcement, a property shared by other concretes that use chemical additives. Using less water makes concrete stronger, but until the development of plasticizers, it also made concrete sticky, dry, and hard to handle, says Christian Meyer, a civil engineering professor at Columbia University.
Making stronger concretes, says Li, allows less to be used, reducing waste and giving architects more freedom. “You can have such futuristic designs if you don’t have to put rebar in there, or structural beams,” says Van Oss. A more directly “green” c6nerete has been developed by the Australian company TecEeo. They add magnesium to their cement, forming a porous concrete that actually scrubs carbon dioxide from the air.
While experts agree that these new concrete will someday be widely used, the timetable is uncertain. Concrete companies are responsive to environmental concerns and are always looking to stretch the utility of their product, but the construction industry is slow to change. “When you start monkeying around with materials, the governing bodies, the building departments, are very cautious before they let you use an unproven material,” Meyer says. In the next few decades, says Van Oss, building codes will change, opening the way for innovative materials. But while new concretes may be stronger and more durable, they are also more expensive — and whether the tendency of developers and the public to focus on short-term rather than long-term costs will also change is another matter.
By saying “it was the concrete age”(Line 3, Para. 1), Van Oss means that
A．the traditional building material concrete is the only man-made miracle.
B．concrete is indispensable in the development of modern construction industry.
C．compared with other inventions, concrete is more practical and useful.
D．concrete, as a building material, can be mixed with any other materials.
听力原文：M: Hi, Linda.
W: Hi, James. What are you doing in the mall？ I thought you said you avoid these places.
M: Oh, I still do, but it's my roommate's birthday tomorrow and I am looking around to get him a present. He's not exactly the easiest person to find a present for.
W: Have you had any ideas of what to get？
M: Not really. I want to get him something he will be able to use instead of something he'lI just put into the closet.
W: That's true. I know often I get something from somebody I hardly ever use. And they stay in the closet or garage before they get thrown away.
M: I know. That's the problem. That's why I hate buying gifts for people because it can never be perfect.
W: Perhaps you are trying too hard to get something very impressive or decorative. I always think a gift should be practical.
M: Oh, I know. His bag is almost wrecked. Maybe I should get him a new one instead.
W: It sounds like a good gift.
M: Gosh, now I am wondering which color I should pick. He is really picky about the color.
W: That's not difficult. What was the last color he chose？ He obviously chose it for a reason.
(1)
A．In a shopping mall.
B．In the dormitory.
C．In the office.
D．In a library.
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