___ has been announced,we shall have our final exam next mon

___ has been announced,we shall have our final exam next month.a. That b.As c.It d. What2.___ Every morning many people get up early to do morning exericises ___ their bodies.a.for building up b.to building upc.building up d.to bulid up3.It's three years ___ he began to learn economy.a.since b.before c.that d.when