Curious about the world around him, my son__   __ask me endless questions when he was young．

—You needn’t take an umbrella.It isn’t going to rain.—Well，I don’t know.It________do.                             

He failed in the driving test again. He         .

--- How’s your new babysitter?  --- We ______ ask for a better one. All our kids love her so much. 

"Those responsible for the accident      be punished while those contributing to solving the problems be rewarded," promised the official then and there.