Question

Only when the war was over         return home.

A．he was able to

B．was he able to

C．could he be able to

D．would he be able

Answer 1

B

考查倒装结构。本题考查Only + 状语从句 + 主谓倒装结构，be able to用其过去式，表示成功的做某事，故选B。