More than two hundred years ago the United States _______ from the British Empire and became an independent country.
He wouldn’t give up smoking _______ his doctor told him it was a matter of life and death.
I sent the letter early that morning _______ she got it that afternoon.
______ did it , I didn’t.
_______I know , the computer can never take the place of the human brain.
I paid only 5 pounds for the book , _______I expected it would cost.