英语选择题
When he had killed the guard, he dragged him into the bushes. ______ the guard he dragged him into the bushes. A. On having killed B. When killing C. When having killed D. On having been killed 觉得选A 没错,但为什么不能选C呢
on doing结构“一...就”,没有on having done结构
有on doing结构“一...就”,没有on having done结构
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问:working hard vs. hard working
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