In time of serious accidents,____we know some basic things about first aid,we can save lives. A whether B. until C. if D unless
_____________ you have done might do harm to other people.
______ hungry I am, I never seem to be able to finish off this loaf of bread.
.Why !I have nothing to confess。________you want me to say?
A computer can only do ____ you have instructed it to do.
It wasn't until nearly a month later________I received the manager's reply .