问题描述：
We 'll have a hiking trip,but when shall we meet?
----- Let's make it ___half past eight_____the morning of JUNE 23.
A at in
b / on
c / in
d about by
----- Let's make it ___half past eight_____the morning of JUNE 23.
A at in
b / on
c / in
d about by
问题解答：
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