Who has cleaned the blackboard?Zhang Shuangwei_
Who has cleaned the blackboard?Zhang Shuangwei_
A has B have C had D does
A has B have C had D does
英语人气：355 ℃时间：2020-02-15 13:22:39
优质解答
选D,本句缺少实义动词,而has只有“有,吃”的意思.does实义动词有“做……”的意思可以代替clean做实义动词,那麽这句好补充完整就是Who has cleaned the blackboard?Zhang Shuangwei does.意思就是：谁擦的黑板?张爽为擦的（黑板）.
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