you can do this work without leave your home这句话有错误吗 leave要不要

you can do this work without leave your home这句话有错误吗 leave要不要改?
请找出下列句子的错误 改正 最好讲一下原因
He will spend one day return to beijing
where is the best place watch stars in our school
It will take us more than 12 hours fly to newyork