He.........dressed at 6.30

1.He.........dressed at 6.30
a.have.   b.has     c. get.    d.gets
2.You should......regular exercise to improve your health
a.drink.     b.drinking.    c.drank.     d.to drink
3.I am cleaning the floor. .........help me open the windows?
a.have you     b.can you.   c.should you.    d.do you