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Since we have made ____, we have to make ____ to achieve more.
A.a progress; effortsB.progresses; an effort
C.much progress; effortD.little progress; efforts
D
考查名词单复数。Progress是不可数名词,排除AB;make an effort to do sth努力做某事。句意:既然我们以及取得了进步,我们不得不努力获得更多、
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