离开那儿，因为他们正在努力重建它们。"rebuild"重建，合乎句意。

　　10. He got to the station early, ________ fear of missing his train.

　　答案：for　"for fear of"以免，以防。句意：他早早到达车站，以防错过火车。

　　[提升·实战能力]

　　Ⅴ. 阅读理解

　　A

　　Hopefully, many of you will begin a new year with a fresh start and a few New Year's resolutions to make this year better than last. Why not create a more eco­friendly house this year? I am not recommending you paint your house green; a few simple solutions could make you feel better about your environmental impact and save you money on your energy bill this winter!

　　Did you know that 40-70 percent of all of your home energy is completely wasted? The 10 biggest energy users in your house are. Obviously, the best way to save energy is to buy new, energy­efficient appliances. Of course, this is not always practical. A few different tricks can still save you energy.

　　Just switching out your light bulbs can have an impact on your home energy use. CFL Light Bulbs may be more expensive, but they last much longer and save 75 percent of the energy. If you have any air conditioner window units that cannot be removed, try to cover the vents (排气孔), both inside and out. This will protect the unit and at the same time, remove any cold air that could be entering your home. This simple and almost cost­free solution is a great way to lower utility bills.

Did you ever think that planting trees around your yard would