–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 |
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–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 |