They are teachers and don't realize
网友回答
选AThey are teachers and don't realize what it takes to start and run a pany.
意思是”他们是老师并且还没有意识到创立和经营一家公司究竟需要什么．”
it takes sb.some time/some money/sth.to do sth.=做...事需要某人花费...(时间/金钱/东西)
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a