问题
选择题
As a colleague he is great, but as a friend he is____failure.That is why their friendship ended in___ ruins.
A．/,/
B．/;a
C．a; a
D．a;/
答案
D
考查冠词。failure作为失败的人或事，是可数名词；in ruins成为废墟，故选D。
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