听力原文:W: David, are you coming with us to the park?M: No, I'm sorry, but I have to catc
听力原文:W: David, are you coming with us to the park?
M: No, I'm sorry, but I have to catch up with my homework.
What is David going to do?
A.Catch a train home.
B.Do his homework.
C.Go to a park.