I think the perfect example of a ________ is someone who passes through a revolving door without pushing. Think about it; they take without giving. Right? They take the other people's push without giving any push!
句意：那些在通过旋转门时自己不动手去推的人是最典型的寄生虫式的人。想一想，他们不给予只 接受。不是吗？他们自己一点都不用力，只借助别人的推力！parasite寄生虫；食客。parody拙劣的模仿。 parable寓言，比喻。paradox悖论，反论。因此，本题的正确答案为B。