(2013·江西南昌一模)It hasn't been made clear _
题型:选择题
问题:
(2013·江西南昌一模)It hasn't been made clear ________ the new underground line is to be open to traffic.
A.when
B.that
C.what
D.where
(2013·江西南昌一模)It hasn't been made clear ________ the new underground line is to be open to traffic.
A.when
B.that
C.what
D.where