nba全明星全名:make a living (by) doing sth这里有by是不是doing sth是充当介宾没by充当定语后置?

We make a living by what we get, Churchill said, but we make a life by what we give. make a living (by) doing sth这里有by是不是doing sth是充当介宾没by充当定语后置? make a living doing.. 和make a living by doing...这里的两个doing是句子的哪一部分结构?是否相同? 英语topic : make a living 给我点提示把 Who earns a living by driving his customers away? Who earns a living by driving his customers away? Who earn a living by driving his custormer away? what does mean by"make a match with"? write out a recipe.make a list of ingredients followed by the method.急急急!!! A. by B. in C. for D. at