Only after liberationto be treated as human beings.A. did they beginB. they had begunC. th

问题补充：

Only after liberationto be treated as human beings.

A. did they begin

B. they had begun

C. they did begin

D. had they begun

答案：

(答案→)A. did they begin

B. they had begun

C. they did begin

D. had they begun

解析：考察only的倒装。Only的倒装要满足2个条件，only放在句首，且强调的表现是状语的时候，后面的句中使用部分倒装的形式。句意：只有在解放以后，他们开始被像人一样地对待。本题的only放在句首，强调的是时间状语after liberation,故后面使用部分倒装的形式。故A正确。