A.closed off
B.closed in
C.closed down
A. closed down
B. shut out?of
C. closed up
D. shut back
The conference closed with a short speech by the ().
A.organize
B.organizer
C.organization
A.ought to be closed
B.be closed
C.shall be closed
D.must be closed
A.opened and closed
B.to be opened and closed
C.being opened and closed
D.having been opened and closed