—No,she didn't. She didn't go to bed ______ 12 o'clock last night.
A:after
B:when
C:until
D:if
《“打扫”森林》发人深省:林务官“新官上任三把火”,命令护林工人“清扫”森林里的____、____、____,结果,此举破坏了大自然的____,毁了____,好心办了极大的坏事。