Dinosaurs lived millions ________ years ago.
A．for B．with C．of
They learned ________ an interesting dance.
A．of B．about C．for
Last Monday, we ________ social studies.
A．hadB．haveC．has
This stone tool was made ________ Peking Man.
A．with B．by C．in
We saw some ________ on the wall.
A．drawings B．drawing C．draws