______ silent, please. The baby is sleeping.
We didn’t go to the concert because we couldn’t to buy the tickets to it.
It is sunny outside. Why not ________ the light and open the window?
A report says that the world’s natural gas deposits (储存) ________ early in the next century.
----- Sir, did you see the sign “ No Parking” ?----- Sorry. I didn’t know parking here isn’t________.
The car needs checking. It may cause accidents if it _______ soon.