It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind， ？
A.was it B.wasn’t it C.did they D.didn’t they
The door burst open and ， shouting with anger.
A.rushed in a crowd B.in a crowd rushed
C.a crowd in rushed D.in rushed a crowd
There is a real possibility that these animals could be frightened， a sudden loud noise.
A.being there B.there having been
C.there was D.should there be
If any employee is found information regarding applicants and staff， he or she will be fired immediately.
A.having leaked B.leaked C.leaking D.to be leaking
The infrastructure of a country is makes everything run smoothly， including things like transport， irrigation， electricity， postal service， telephones and schools.
A.that B.what C.which D.as
We should be able to do the job for you quickly， you give us all the necessary information.
A.in case B.provided that C.or else D.as if
