题目

1 —When did you come back from Beijing?
—_____ the morning of April 18th
A:At B:Within
C:On D:In
2 There will be many famous paintings________this Sunday.I'll go and appreciate them.
A:on show B:on duty
C:on watch D:on business
3 The children had their besutiful clothes _______bacause it's Children's Day.
A:in B:on
C:with D:over

提问时间：2020-07-18

答案

1.选C.在具体某一天用on.
2.选A.on show展出.
on duty值日,on watch值班,on business出差办事.
3.选B.穿衣服说成have...on