An army spokesman stressed that all the soldiers had been ordered _____ clear warning before firing any shots.
Today’s teens don’t see anything strange in the fact _______the computer takes up a central place in their social lives.
I _______to go shopping that Saturday, but the bad weather made me change my mind.
---______ the farmers discovered the entrance to the secret cave in the valley?--- Totally by chance.
One more month, _______ the grapes in the yard will be ripe.
_______these coins are of different shapes, sizes and colors, they all date back to a long, long time ago.