—________is a boat ticket for children?
问题:
—________is a boat ticket for children?
—How old is your child? It’s free for kids under three years old.
A.How long
B.How much
C.How often
D.How soon
—________is a boat ticket for children?
—How old is your child? It’s free for kids under three years old.
A.How long
B.How much
C.How often
D.How soon