问题补充：
Only when possible to settle the problem.
A. does the chief editor come will it be
B. the chief editor comes will it be
C. has the chief editor come it will be
D. the chief editor comes it will be
答案：
A. does the chief editor come will it be
(答案→)B. the chief editor comes will it be
C. has the chief editor come it will be
D. the chief editor comes it will be
解析：句意：只有当主编来了，才有可能解决这个问题。Only接时间状语从句放在句首的时候，时间状语从句不要倒装，但是后面的主句要倒装，所以选B。
