You must look after things.填人称代词和物主代词
问题描述：
You must look after things.
填人称代词和物主代词
答
You must look after things.------You must look after them.
答
人称代词：you 物主代词：没有.因为本句里面的things就是名词,不是代词.如果things在下一句里被替代成their.那么their就是物主代词.