We are going to use ____________ plastic balls in our next yoga class.

No living thing can ___________ without water.

If you throw something in the air, it will fall down due to the force of __________.

Scientists believe  that we need to ____________ other planets to save the human race.

I ___________ who that girl is. I have never seen her before.

The band has never ___________ this song before.

The sun was ____________ and the birds were singing.

Will you please ________ the door?

How many languages can Mary ____________ ?

I ___________________ for nine hours last night.