20．16．Steven likes best．
A．taking long walks
B．climbing mountains
C．breathing fresh air
17．Steven's favorite animal is____________．
A．cats
B．dogs
C．birds
18．Steven often plays games with_____________．
A．his friends
B．his dogs
C．his parents
19．The duck tour is _____________．
A．in Washington
B．in New York
C．in Boston
20．People feel _______ when staying with Steven．
A．bored
B．happy
C．sad．
