They weighed the advantages of the operation ______ all the possible risks involved over and over again.
By accepting lower prices, organizers can sell tickets that would ______ go unsold.
The lack of health facilities and necessary protection for medical workers partly ______ the epidemic (蔓延) of Ebola.
Dozens of people were waiting with a camera for ______ seemed like hours, hoping to catch a glimpse of the US First Lady, Michelle Obama.
— Can I make an appointment with Dr. Smith this afternoon? — Sorry, I’m afraid he is not ______ because he has a patient to operate on.
The disaster relief funds are already ______ so that people in the earthquake-stricken area can carry out reconstruction work without delay.