题目内容

—Look! Somebody ______the blackboard．
—Well, it wasn't me．I didn't do it．
A．is cleaningB．was cleaning
C．had cleanedD．has cleaned
D

试题分析：考查时态：句意：--看有人擦过黑板了。---哦，不是我，我没做。从句意看这句话强调的是现在黑板被擦过的结果，用现在完成时。选D。
点评：考查时态题，如果有时间状语，就充分利用时间状语，如果没有，要结合上下文找出来。这句话的it wasn't me．I didn't do it．就是明显的暗示
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