1.The last bus has just left. I’m afraid you _____ walk home.
A.can
B.may
C.must
D.have to
2.——I’m sorry I didn’t win in the race. ——Bad luck! Well, you ______ win every time.
A.can’t
B.must
C.should
D.mustn’t
3.——Do you have to take care of your mother at home?
——Yes, I ____.
A.do
B.must
C.have
D.shall
