问题
Only when ______ in 1918, ______ happily back to work.
A:the war was over … he went
B:was the war over … did he go
C:the war was over … did he go
D:was the war over … he went
B:was the war over … did he go
C:the war was over … did he go
D:was the war over … he went
正确答案是：
