—We’ll have a hiking trip, but when shall we meet?
—Let’s make it half past eight the morning of June 1.
A. at; in
B. at; on
C. /; in
D. about; by
网友回答
A. at; in
(答案→)B. at; on
C. /; in
D. about; by
解析：此题考查介词在表示时间上的基本用法，at用在具体时刻前面；on用在具体的某一天的上午，下午或晚上。