If there (not be) ... gravity, the moon (shoot) ... into space instead of traveling around the earth

1, If there ( not be)       gravity, the moon ( shoot)     into space instead of traveling around the earth.
2, If I were your age, I (do)       differently.
3 , If I should find your passport, I ( telephone     you at nice.
4, If I (have)      wings, I (not have to)        take an airplane to fly home.
5, This letter will be in Ho Chi Minh in two days.I'm sure If I (send)      it today, it( arrive)   in time.
6 I am not an astronaut. If I (be )     an astronaut, I take     my camera with me.
7, Most people know that oil floats on the water. If you (pour)     oil on the water, it (float)      .
8, It is been a long drought. It hasn't rained for over a month. If it ( not rain)      soon, a lot of crops(die). If the crops ( die)      many people ( go)    hungry this coming winter.
10, People ( be)        able to fly if they ( have)      feathers instead of hair?