Another two months will be needed before the new bridge ___A completesB is completedC has completedD will be completed 求答案和选择这个答案的原因,正确答案是B求为什么是B
问题描述：
Another two months will be needed before the new bridge ___
A completes
B is completed
C has completed
D will be completed 求答案和选择这个答案的原因,
正确答案是B
求为什么是B
答