Leave your key with your neighbor      you lock yourself out one day.

_____I always felt I would pass the exam, I never thought I would get an A.
A. While            B. Once             C. If             D. Until

Bicycling is good exercise; _______, it does not pollute the air.

Jerry did not regret giving the comment but felt ______ he could have expressed it differently.

You have to move out of the way        the truck cannot get past you.

I don't believe we've met before,         I must say you do look familiar.

It is by no means clear      the president can do to end the strike.

A number of high buildings have arisen _______ there was nothing a year ago but ruins.

He smiled politely ______ Mary apologized for her drunken friends.

It doesn’t matter ________ you pay by cash or credit card in this store.