I don’t like science _____ it’s difficult．
A．because
B．but
C．and
There are___________months in a year．___________month is December．
A．twelve; Twelfth
B．twelve; Twelve
C．twelve; The twelfth
______________Lily and Mary like to learn Chinese?
A．Do
B．Does
C．Are
—__________?
—Yes, I want a red bag．
A．Can I help you
B．What color is it
C．What is it
—Are you __________, Mike?
—Yes．I have a lot of homework to do．
A．busy
B．happy
C．free
—Let's __________ computer games．
—That sounds interesting．
A．playing
B．to play
C．play
