单选题
38.
When I saw the mess my paper was in, it was obvious that someone ______ it.
A、
was reading
B、
would have read
C、
had been reading
D、
had read
【正确答案】
D
【答案解析】
注意saw，表明别人渎的动作发生在我发现之前，用过去完成时。
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