就像楼上说滴~很多次没注意不可数名词要接动词单三形式哦~
Students have different viewS about happiness.
knowledge is power.power--POWERFUL 此处需要形容词
you will do much for mankind.will-can
they can bring their partents(拼写错了) to travel all over the world and have spare time.觉得整句话不怎么对
they can company their parents travelling and enjoy themselves because they can have more spare time.
纠正楼上一点~think是可以做及物动词滴~所以最后一句是没错滴~