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2. We need to conserve our resources to buy ourselves time so scientists can find new solutions to our problems.

A. We should conserve our resources. If we do so the money we save will be used to find new solutions to our problems.
B. We should conserve our resources. If we do so the resources will probably last long enough for scientists to find new solutions to our problems.

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3. His list, in descending order of importance, was: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population.

A. His list contains ten items: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population. They are arranged in such a way that each item is more important than one that follows it.
B. The ten items on his list----energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population----are gradually losing importance now.

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4. The reason energy and water sit at the top, ahead of food and poverty, is that addressing them makes subsequent problems easier to deal with.

A. Energy and water are the top two problems on the list. The reason is that if we start to solve these problems, the other problems that follow them on the list, such as food and poverty, will be easier to deal with.
B. Energy and water are listed as the two problems more important than food and poverty. This is because once we start working on them, addressing food shortage and poverty will be easier later on.

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5. … even though fixing water would help our energy, defense, and health problems.

A. … even though solving the water problem would help solve energy, defense and health problems.
B. … even though using water in an economical way would help solve energy, defense and health problems.

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Choose the most appropriate words to complete the following sentences.(填写对应序号)1. Water could replace oil as the strategic resource that __1 geopolitical conflicts.2. That statement still rings in my ears today, not only because of her _2___ but also because she was exactly right.3. Now, the dawn of a new energy era is just around the corner --- with the prices of solar power going down, and _3__ generation and energy efficiency on the point of taking off.4. We can foresee a time this century when water 4_ energy as the next great challenge for humanity.5. “If we could ever _5__ --- at a cheap rate --- get freshwater from saltwater, it would be in the long-range interest of humanity and would really dwarf any other scientific accomplishments.”6. As Michael Webber argues, we need aggressive _6__ to buy us time before scientists come up with affordable solutions.7. In 2003, the late Nobel Laureate Richard Smalley gave a lecture at Rice University’s Energy & Nanotechnology Conference 7_ humanity’s top 10 problems for the next 50 years.8. The reason energy and water sit at the top, ahead of food and poverty, is that addressing them makes _8___ problems easier to deal with.9. She turned off the faucet, made me an angry face at me, and _9__, “Turn off the water, Daddy. The scientists need time.”10. That’s mainly because our great innovation apparatus has not been 10_ to water.

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2. We need to conserve our resources to buy ourselves time so scientists can find new solutions to our problems.

A. We should conserve our resources. If we do so the money we save will be used to find new solutions to our problems. B. We should conserve our resources. If we do so the resources will probably last long enough for scientists to find new solutions to our problems.

3. His list, in descending order of importance, was: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population.

4. The reason energy and water sit at the top, ahead of food and poverty, is that addressing them makes subsequent problems easier to deal with.

5. … even though fixing water would help our energy, defense, and health problems.

A. We should conserve our resources. If we do so the money we save will be used to find new solutions to our problems.
B. We should conserve our resources. If we do so the resources will probably last long enough for scientists to find new solutions to our problems.