–Did you your sister when you were in Shanghai?--No. But I my uncle’s during my stay the

–Did you your sister when you were in Shanghai?
--No. But I my uncle’s during my stay there.
A. call on, called on
B. call at, called at
C. call on, called at
D. call at, called on

A. call on, called onB. call at, called at(答案→)C. call on, called atD. call at, called on解析：可联系答.案.网客服索取。

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