31. Ken: _________ _________ is a boat ticket(船票)for children? Paul: How old is your child? It’s fre
問題詳情
31. Ken: _________ _________ is a boat ticket(船票)for children? Paul: 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