问题：
________ there is going to be a policy change ________ of those things is going to change.
[ ]
A．Unless; few
B．Until; few
C．Unless; none
D．Until; none
________ there is going to be a policy change ________ of those things is going to change.
B．Until; few
C．Unless; none
D．Until; none
[ ]
A．Unless; few B．Until; few
C．Unless; none
D．Until; none
参考答案：