◎ 题干
Do you think we should ________ Bob's while we are in London?
[     ]
A.call on
B.call for
C.call at
D.call upon
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Do you think we should ________ Bob's while we are in London?[ ]A.call onB.call forC.call atD.call upon…”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。