It is well known to us all that a lot of rivers _______by factories.
A.are polluting B.have been polluting
C.are being polluting D.are being polluted
I feel ____to have been invited to give a speech here.
A.honour B.great honour C.honoured D.honouring
It was along the Mississippi Rever ____Mark Twain spent much of his childhood.
A. how B.which C. that D.where
--Why did the police ______________the crowd?
---Because the president’s car __________in the street.
A. break down; broke down B. break up; broke up
C. break down; broke up D. break up; broke down
___________ made the school proud was ___________ more than 90% of the students had
been admitted to universities.
A．What; because B．What; that C．That; what D．That; because
It was hunger that his great-grandfather amd grandfather _________.
A.died of B.died out C.died down D.died away
