Most of the students haven’t finished their papers on time for __________reasons---one of which was that they carried out a week-long investigation in the countryside.
A. previous B. accurate
C. original D. various
The government is devoting resources to establish public health systems. _________ , the physical conditions of children have improved greatly.
A. However B. Meanwhile
C. Nevertheless D. Otherwise
The teacher finally _______ his project to the school board for approval.
A. admitted B. permitted
C. submitted D. accused
Looking for information on line today is very easy ; the _____________is how to tell whether the information you are getting is useful or not.
A. challenge B. ability
C. knowledge D. competition
It’s reported that global warming is heating the planet twice as quickly as _____ feared.
A．extremely B．preciously
C．previously D．eventually
The little boy, out of curiosity, _______ the toy to see how it worked, but couldn’t put it together.
A．took apart B．broken down
C．burst into D．knocked off
