The government has taken some measures t
题型:选择题
问题:
The government has taken some measures to solve the shortage of electricity, but it may be some time
________ the situation improves.[ ]
A. since
B. when
C. unless
D. before
The government has taken some measures to solve the shortage of electricity, but it may be some time
________ the situation improves.[ ]
A. since
B. when
C. unless
D. before