He sang just now.(用when I came here 改写句子) He _______ ________ when I came here
问题描述:
He sang just now.(用when I came here 改写句子) He _______ ________ when I came here
He cleaned the blackboard yesterday.(用at this time yesterday代替yesterday)
He ______ _______ the blackboard at this time yesterday
答
应该填写
was singing
was cleaning