Since we have made ____, we have to make ____ to achieve more.
A．a(chǎn) progress; effortsB．progresses; an effort
C．much progress; effortD．little progress; efforts
D
考查名詞單復(fù)數(shù)。Progress是不可數(shù)名詞，排除ＡＢ；make an effort to do sth努力做某事。句意：既然我們以及取得了進(jìn)步，我們不得不努力獲得更多、
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