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
The statistical figures in that report are not_______. You should not refer to them.
As nobody here knows what is wrong with the machine, we must send for an engineer to _______ the problem.
Before driving into the city, you are required to get your car_________.
Research suggests that fast food and soft drink directly _________ to childhood obesity.
You will _________sooner or later if you keep working like that.