--We’ll have a hiking trip but when shall we meet??--Let’s make it half past eight the mo

问题补充：

--We’ll have a hiking trip, but when shall we meet??

--Let’s make it half past eight the morning of May 1st.

A. /; on

B. at; in

C. ./; in

D. at; on

答案：

(答案→)A. /; on

B. at; in

C. ./; in

D. at; on

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