有关英语语法it,that,which的问题,
Mister Armstrong also helped write a funny book about life as a full-time television watcher.It is called the "Official Couch Potato Handbook." 这句话中 的it 可以用that
Couch potatoes enjoy watching television just as mouse potatoes enjoy working on computers.A computer mouse is the device that moves the pointer,or cursor,on a computer screen.这句话中的that可以用which替代吗?