The World Health Organization gave a warning to the public without any______when the virus of H1N1 hit Mexico in April, 2009.
The car accident on the main road the other day ____ the careless driving of a driver.
He couldn’t ____ the noise, so he kept the windows shut all day long.
I became more and more excited, trying to work out ____ Mom was taking us on holiday.
____ to reach the headmaster on the phone, the student sent an email instead.
The lawyer required the ____ of evidence so that he could defend the accused.