问题
选择题
Helen's mother usually gets up _____ seven o'clock _____ Sunday morning. [ ]
A. in; on
B. at; on
C. on; at
D. at; in
答案
答案：B
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Helen's mother usually gets up _____ seven o'clock _____ Sunday morning. [ ]
A. in; on
B. at; on
C. on; at
D. at; in
答案：B