Li Hua is a volunteer.She will put up a sign to remind people to save every drop of water.Which of the following signs should she choose?( )
A.B.
C.D.
Which of the following is a traffic sign?( )
_____ useful the information you've provided is!( )
A.What aB.WhatC.What anD.How
I'm going out. I'll be back _____ an hour.( )
A.atB.onC.inD.from
Father was so busy with his work that he had _____ time to read the newspaper.( )
A.someB.littleC.muchD.a bit of
_____ it rained a lot, we enjoyed our holiday.( )
A.AlthoughB.BecauseC.UnlessD.However