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
Someone is ringing the doorbell. Go and see .
A. who it is B.who is it C.who is he D.who he is
It is said that the student seriously ill for two months last semester.
A.was B.is C.had been D.has been
