Choose the correct answer. If you ........ exercises regularly, you will be stronger and healthier

choose the correct answer
1if you ........ exercises regularly , you will be stronger and healthier
A do         B will do         C did       D are doing 
2 it won't be possible to save the earth if we don't take .........
A action         B job    C polluting      D polluted
3 America ..... Thanksgiving  day on the fourth thursday of november since 1864 
A celebrate       B has celebrated      C celebrated        D celebrates
4 water pollution ... mainly by industrial waste and sewage form households
A causes     B is caused     C was causing               D had caused 
5 according to the weekly schedule , we ..... english next week 
A have     B will have     C is having      D had