— What impressed you most?
—The clear logical ________ of her arguments.
A.acquisition B.submission C.imagination D.presentation
The popular belief has been challenged after a recent research ________ cartilage(软骨) in human joints can’t repair itself.
A.where B.whether C.when D.that
In order to keep extra cash in your monthly budget, you may ________ 30% on your first home, instead of 40%.
A.put down B.bring down C.take down D.get down
Jenny feels a blankness ________ she once felt a sense of purpose and excitement.
A.unless B.where C.as D.since
LED lighting, even in most developed countries, ________ long enough to know its effects across the human lifespan.
A.has not been used B.was not used
C.had not been used D.is not being used
In this giant city, they had no one else ________ support they knew they could count on.
A.of whom B.of which C.whose D.that
