－What does it mean?
－It ________ we shouldn't park our cars here.
A. mean B. means C. meaning
What________they mean?
A. does B. do C. did
－Can I go in?
－________
A. No，I don't.
B. Yes，I am.
C. Yes，you can.
There are ________ public signs in the park.
A. a lot of B. lot of C. a lots of
Listen，read and say