◎ 题干
—________is a boat ticket for children?
—How old is your child? It’s free for kids under three years old.
A.How longB.How much C.How often D.How soon
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ —________is a boat ticket for children?—How old is your child? It’s free for kids under three years old.A.How longB.How much C.How often D.How soon…”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。