By accepting lower prices, organizers can sell tickets that would ______ go unsold.
A. therefore B. otherwise
C. instead D. however
The lack of health facilities and necessary protection for medical workers partly ______ the epidemic (蔓延) of Ebola.
A. accounted for B. headed for
C. called for D. sent for
Dozens of people were waiting with a camera for ______ seemed like hours, hoping to catch a glimpse of the US First Lady, Michelle Obama.
A. that B. when C. which D. what
— 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.
A. convenient B. available
C. accessible D. valid
The disaster relief funds are already ______ so that people in the earthquake-stricken area can carry out reconstruction work without delay.
A. in place B. in demand
C. in order D. in vain
The Adulthood Ceremony was held in the school lecture hall ______ seats approximately 500 students.
A. where B. whose C. which D. when
