◎ 题干
---Why do you look so worried?
---I’m expecting a call from my son. He              London for three days.
A.has been toB.has been in
C.has gone to D.has come in
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“---Why do you look so worried?---I’m expecting a call from my son. He London for three days.A.has been toB.has been inC.has gone toD.has come in…”主要考查了你对  【实义动词的单数第三人称形式】【实义动词】【动词短语】  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。