It is known that water is not ___ endless resource , nor ____ that can be made once more.
His illness ________ his absence.
Look at the sign, Sir. We don’t permit ________ in the hall.
Would any one of you please tell me ______ to the railway station?
— Did you plan to meet here? — No, we met ________.
We arranged to meet at 8:00, but she didn’t ______.