明天上午英语中考,1.Wet floor.Mind your own（）,Sure!-----thank you ver

明天上午英语中考,
1.Wet floor.Mind your own（）,Sure!-----thank you very much.
A.action B.duty C.legs D.step（意思说一下)
2.She really wants to know （ ）
A.what is wrong with her aunt.B.how wili her aunt go to Beijing tomorrow
c.why does her aunt buy a car D.where did her aunt go yesterday（答案是A,可A哪是陈述句语气）
3.if people( ) polluting our home earth,we will have nowhere ( )
A.keep,to live in B.will keep,to live in C.keep,to live D.will keep,to live(为什么是选c,而不选A,