Only after he explained the whole thing clearly____to leave the police station
问题描述：
Only after he explained the whole thing clearly____to leave the police station
A.was he allowed B.he was allowed C.did he allow D.he allowed
答
only +状语 引起主句的倒装.
be allowed to do sth
本身应该是 he was allowed to leave·············
但是 由于 句首是 only+after 的状语,
所以要倒装
变为
was he allowed to leave