◎ 题干
-What has made you so happy,Mary?
-Oh,I've just________an old friend I haven't seen for years.
[     ]
A.come upon  
B.come in
C.come out  
D.come  up
◎ 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“-What has made you so happy,Mary?-Oh,I've just________an old friend I haven't seen for years.[ ]A.come uponB.come inC.come outD.comeup…”主要考查了你对  【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。