问题
选择题
I have P. E.________ 10 o'clock ________ the morning. [ ]
A. in; on
B. at; in
C. at; on
D. on; to
答案
答案：B
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I have P. E.________ 10 o'clock ________ the morning. [ ]
A. in; on
B. at; in
C. at; on
D. on; to
答案：B