问题
选择题
Ann helps Lily with her homework ______ eight o'clock ______ Sunday. [ ]
A. on; in
B. in; on
C. at; on
D. at; in
答案
答案：C
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Ann helps Lily with her homework ______ eight o'clock ______ Sunday. [ ]
A. on; in
B. in; on
C. at; on
D. at; in
答案：C