有两道选择题，答案不一样：
1、We'll have a hiking trip,but when shall we meet?
Let's make it _____half past eight _____the morning of June 21.
A.at,in B./,inC./,in
2、We'ii have a hiking trip ,but when shall we meet?
Let's meet___half past eight___
the morning of June 21
A,at,in
B.at ,on
C./,at D./,on
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