请教一道填空题

zmshen2009UID: 3200256

Salazars presence in the group was so____ the others that they lost most of their earlier___; failure, for them, became all but unthinkable.
(i) A.unnoticed by B.reassuring to C.unexpected by
(ii) D.confidence E.exhilaration F.trepidation

这道题为什选BF呢，完全没有理解啊，求解答

zezhouUID: 2438291

这个题主要在"failure,for them, became all but unthinkable" 的理解吧。这句话的意思是 "failure became almost unthinkable"，因此第二空填 trepidation。 它们早期是害怕的，换句话说现在的成功是没有预料到的，因此第一空填 C