◎ 题干

25. ---- Ricky, why hasn’t Billy been with us these days?
---- Oh, he is _________for next month’s 400m race.
A.standing out B.taking up C.backing out D.working out
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“25. ---- Ricky, why hasn’t Billy been with us these days?---- Oh, he is _________for next month’s 400m race.A.standing outB.taking upC.backing outD.working …”主要考查了你对  【动词短语】【动词】  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。