According to the new rules, if a student ________ happen to damage something in the campus, he/she should report it those concerned immediately.
A. should B. will C. shall D. would
Three days after the aircraft went missing, an international effort ________ ships and planes hasn't found any wreckage, ____ growing frustration for the families of the 239 people on board.
A. involved; causing B. to involve; caused
C. involving; causing D. involving; having caused
These remarkable findings suggest the elephants have ________ a memory capacity to make distinctions between human voices.
A. built up B. packed up C. brought up D. took up
People all think it strange that the boy should tell what’s written on the paper in another room without looking at it. It really ________ explanation.
A. prevents B. challenges C. interrupts D. confuses
It’s nearly four years since I worked in that firm. I ________ a band with other fellows.
A. operated B. had been operating
C. was operating D. am operating
Protesters calling for a higher minimum wage gather on Tuesday in Miami, Florida, as part of __________ organizers called a “ day of action” nationwide to improve the salaries of fast food workers in the United states ______ are badly paid.
A. which; who B. what; that
C. what; how D. how; which
