Jane and I ____ twelve. My sister ____ ten.

One third of our school _________ covered by trees, while the majority of our students ________ girls. 

A teacher and artist ______coming to speak to us about painting tomorrow afternoon.

The factory used 65 percent of the raw materials, the rest of which _______ saved for other purpose.

I don’t know her. She is ________ my classmate nor my friend.