A.had been working;are still working
B.had worked;were still working
C.have been working;have worked
D.have worked;are still working
答案 A [不难看出第一空的动作发生在I joined them以前,且持续了一个周,应该用过去完成进行时;and now说明下面的动作仍在进行之中,应该用现在进行时。]
15.Mrs.White showed her students some old maps________from the library.
A.to borrow
B.to be borrowed
C.borrowed
D.borrowing
答案 C [本题考查非谓语动词。句意为:怀特老师给她的学生展示了一些从图书馆借来的地图。及物动词的过去分词形式作后置定语,既表被动,亦表完成。to be borrowed表示一将要发生的被动动作,与句意不符。结合题意,应选择C项。]
Ⅱ.完形填空
War, money and power are a few things that countries and people are concerned about.__16__I agree that those things are important, I believe that everyone should start to__17__ more on a growing problem—global warming.
Global warming will not only__18__our country and our generation, but also the entire__19__ and future generations. It is__20__ because the weather has been a lot warmer over the past few years, which__21__the melting(融化) of the ice in the Antarctic. This will soon cause water levels to __22__and flood parts of the world.
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