题目内容
You waste much time______pig flu.on the internet..
A. to know B. knowing C. know D. to be known
B
解析:
考查waste的固定用法。Waste----doing sth 浪费---做某事。
习题精选系列答案完形填空(共20小题; 每小题1.5分，满分30分)
阅读下面短文，掌握其大意，然后从所给的 A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
Time is the easiest thing in the world to waste—the most difficult to control. When you look ahead, it may appear you have 36 you need. Yet it has a way of slipping 37 your fingers like quicksand. You may suddenly find that there is no way to stretch the little time you have 38 to cover all your obligations. For example, 39 a beginning student looking ahead to a full term you may feel that you have an oversupply of time on your hands.40 toward the end of the term you may be 41 because you are running out of time. How can you do? —Control!
Time is 42 . If you don't control it, it will control you. If you don't make it work for you, it will 43 you. You must become the master of time, not the servant. “Study hard and play hard” is an old saying, but it still 44 . You have plenty of time for classes, study, work, and play if you use your time 45 . It is not how much time you allocate for study that 46 but how much you learn when you do study.
Too much wasted time is 47 medicine. The more time you waste, the easier it is to continue wasting time. Soon, doing nothing becomes a habit you can't 48 . You will be 49 to wasting time. When this happens, you 50 your feeling of accomplishment and you fall by the wayside. A full schedule is a good schedule. Some students 51 to hear the time message. They refuse to 52 the fact that college life demands some53 of time control. There is no escape. So wh
at's the next step? If you seriously want to get the time message, the next passage will give it to you. 54 — it will not only improve your grades but also free you to 55 college life more.
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Electric ears are dirty.In fact, not only are they dirty, they might even be more dirty than their gasoline-powered cousins.
People in California love to talk about "zero-emissions vehicles", but people in California seem to be clueless about where electricity comes from. Power plants mostly use fire to make it. Aside from the new folks who have their roofs covered with solar cells, we get our electricity from generators. Generators are fueled by something---usually coal, oil,but also by heat generated in nuclear power plants. There are a few wind farms and geothermal plants as well, but by far we get electricity mainly by burning something.
In other words, those "zero-emissions" cars are likely coal-burning cars. It's just because the coal is burned somewhere else that it looks clean. It is not. It's as if the California Greens are. covering their eyes---"If I can't see it, it's not happening." Gasoline is an incredibly efficient way to power a vehicle; a gallon of gas has a lot of energy in it.But when you take that gas (or another fuel) and first use it to make electricity, you waste a nice part of that energy, mostly in the form of wasted heat---at the generator, through the transmission lines, etc.
A gallon of gas may propel your car 25 miles. But the electricity you get from that gallon of gas won't get you nearly as far---so electric cars bum more fuel than gas-powered ones. If our electricity came mostly from nukes; or geothermal,or hydro, or solar, or wind,then an electric car truly would be clean. But for political, technical,and economic reasons,we don't use much of those energy sources.
In addition,electric cars' batteries which are poisonous for a long time will eventually end up in a landfill.And finally, When cars are the polluters, the pollution is spread across all the roads. When it's a power plant, though, all the junk is in one place. Nature is very good at cleaning up when things are too concentrated, but it takes a lot longer when all the garbage is in one spot.
【小题1】 What does "clueless" mean in paragraph 2?
| A．People are seeing the California Greens everywhere. |
| B．People in California love to talk about zero-emissions vehicles. |
| C．People in California love to have their roofs covered with solar cells. |
| D．People there have no idea that so far electricity mainly comes from burning |
【小题2】 What is the main idea of the passage?
| A．Electric cars are not clean at all |
| B．Electric cars are better than gasoline-powered ones. |
| C．People cast doubts on electric cars' batteries. |
| D．Gasoline is an efficient way to powera vehicle. |
| A．not less than 25 miles | B．more than 25 miles |
| C．no more than 25 miles | D．not more than 25 miles |
| A．do not burn fuel and more environmentally-friendly |
| B．are toxic because it is difficult for nature to clean it up when their batteries are buried in one spot. |
| C．are very good at cleaning up when things are not too concentrated |
| D．are poisonous for a long time and will eventually end up in a landfill |
| A．being green is good and should be encouraged in communication |
| B．electric cars are not clean in that we get electricity mainly by burning something |
| C．zero-emissions vehicles should be chosen to protect our environment |
| D．electric cars are now the dominant vehicle compared with gasoline-powered |