it was not possible that she _____ go down ,step by stey down the unexpected stairs into the dark below.a.should dare b.should dare to c.must dare d.must dare to 选b,为什么to不用省略
问题描述：
it was not possible that she _____ go down ,step by stey down the unexpected stairs into the dark below.
a.should dare b.should dare to c.must dare d.must dare to
选b,为什么to不用省略
答
dare to do表示敢于做某事
to省略的话，dare就是情态动词，不可以用在这里。
答
虚拟，否定
答
should这里情态动词,表“竟然”,dare“敢”,明显的在这里肯定是实义动词（因为前已有情态动词）了,固定搭配后要加to,
答
因为dare to是固定搭配、、、