一When does your mother go shopping?
一Usually ______ Sunday mornings.

A. on
B. in
C. at
D. for
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科目：初中英語 來源：山東省期中題 題型：單選題

一When does your mother go shopping?
一Usually ______ Sunday mornings.
[     ]
A. on
B. in
C. at
D. for

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