I'm interested ________ sports.
A．in B．on C．for
I know _________ mother is a duck.
A. they B. their C. them
There _________ a lot of sheep over there.
A. is B. isn’t C. are
The bear has four _________.
A. baby B. babies C. babys
--- Mary, let’s _________ animals. --- All right.
A. make B. makingC. makes
The hens _________ swim.
A. can B. can’t C. are