He is going camping 6:00 the morning of July 21st. A. in; on B. on; at C. at; on D. at; ——青夏教育精英家教网—

题目内容

He is going camping _____ 6:00 _____ the morning of July 21^st.

A. in; on
B. on; at
C. at; on
D. at; in

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