阅读下面选文，回答问题。
    言未毕，阶下一人大呼出曰：“小将愿往斩华雄头，献于帐下！”众视之，见其人身长九尺，髯长二尺，丹凤眼、卧蚕眉，面如重枣，声如宏钟，立于帐前。绍问何人。公孙瓒曰：“此刘玄德之弟关羽也。”绍问现居何职。瓒曰：“跟随刘玄德充马弓手。”帐上袁术大喝曰：“汝欺吾众诸侯无大将耶？量一弓手，安敢乱言！与我打出！”曹操急止之曰：“公路息怒。此人既出大言，必有勇略；试教出马，如其不胜，责之未迟。”袁绍曰：“使一弓手出战，必被华雄所笑。”操曰：“此人仪表不俗，华雄安知他是弓手？”关公曰：“如不胜，请斩某头。”操教酾热酒一杯，与关公饮了上马。关公曰：“酒且斟下，某去便来。”出帐提刀，飞身上马。众诸侯听得关外鼓声大振，喊声大举，如天摧地塌，岳撼山崩，众皆失惊。正欲探听，鸾铃响处，马到中军，云长提华雄之头，掷于地上。其酒尚温。

    Betsy was born in Brooklyn, New York. Most of her childhood was spent in New York City, in a house filled ____ books. It was then that she grew to love books and reading.

    Before she became ____ writer, Betsy taught kindergarten (幼儿园) and first grade. For her, the best part of the school day ____ (be)story time, when she could share her favorite books with the class. She decided ____ (try) writing her own children's books after she met her husband, illustrator (插画家) Giulio. Together, they have ____ (create) many books. She writes the words, and he draws the pictures.

    Betsy believes that writers should always edit (编辑) their own work and then ask someone else to look it over. "Your editor can be your teacher, one of your parents, your older brother ____ sister, or someone in your class who is good at ____ (write). Your editor will see your work ____ (different) from the way you see it, so you will get a new point of view (见解)."

    Betsy and her husband like to travel, and they sometimes do research for their books on ____ (they) trips. They also enjoy talking to students when they visit schools and ____ (library).

地球在太阳系中是一颗既普通又特殊的行星，其特殊性主要是指（    ）