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-whenwilltheycomeback?-theywillarriveattheairportthemorningMay,7,2008A.on;onB.in;ofC.in;onD.on;of应该选哪个?为什么?

题目详情
-when will they come back?
-they will arriveat the airport ___ the morning ___
May ,7,2008
A.on;on B.in;of C.in;on D.on;of
应该选哪个?
为什么?
▼优质解答
答案和解析
选D.前面填on是毋庸置疑的,因为具体到某一天的早晨一定要用on .