We learned a lot ________ field trips.
A．with B．from C．in
I learned to ________ a lot of things.
A．doing B．do C．does
We learned ________ from the reference books.
A．a lot B．many C．a lot of
My studies in primary school ________ coming to an end.
A．is B．are C．am
Koalas live in________．
A．Australia B．Africa C．Italy