史学家陈旭麓认为:“民族的反思,是在遭遇极大的困难中产生的。一百多年来,中华民族的第一次反思是在鸦片战争后,渐知诸事不如人,只有学习西方。第二次则是反思何以学了西方仍然失败。”其中“第二次反思”开始于( )
_______ Children's Day,all the children are very happy.( )
A.toB.InC.On
What were you doing when I phoned you yesterday evening?
I _______ my homework.( )
A.was doingB.have doneC.did
Fifty yuan ________ enough.( )
A.isB.amC.are
My teacher asked me ________ the room.( )
A.cleanB.cleansC.to clean
Is this your pencil?Yes,it's _________.( )
A.myB.meC.mine