In December of 2015, the Second World Internet Conference was held in Wuzhen,（ ）theme is to ensure peace and security in cyberspace.
A.正确答案Awhose
B.which
C.when
D.where
In December of 2015, the Second World Internet Conference was held in Wuzhen,（ ）theme is to ensure peace and security in cyberspace.
In December of 2015, the Second World Internet Conference was held in Wuzhen,（ ）theme is to ensure peace and security in cyberspace.
A.正确答案Awhose
B.which
C.when
D.where
