B
句意:温莎城堡在过去没有被用于做什么?
A 一所监狱;B 国王查理一世的私人家园;
C 国王和王后的家;D 皇室成员的庇护所
本题考查细节信息。
根据第三段前三行句子:Kings were born and died here. It's been used as a home for kings and queens for centuries.However, it was also used as a prison during the English Civil War (1642-1651).King Charles I was even a prisoner there.During World War II,the royal family secretly slept at Windsor Castle. 国王在这里出生和死亡。几个世纪以来,这里一直是国王和王后的家。 然而,在英国内战(1642-1651)期间,它也被用作监狱。国王查理一世甚至是那里的囚犯。二战期间,皇室秘密睡在温莎城堡。
可知没有被用作查理一世国王的家,故本题选B。