Hoành thành các câu sau

1 . won't / tomerrow. / come/ class/ I/ to/
2. we /to/we/energy/. /If/ walk/school/will/save/
3.about/the/don't/write Rs /there/Why/you/?/
4.If/dirty/won't have/ fresh water / drink./ this/ river/ we/ enough/is/to/