She got so well prepared that she passed the challenging test____
A、at most
B、 with luck
C、 with ease
D、 at best
【正确答案】：C
【题目解析】：考查介词短语词义。选项A. at most(多,至多);选项B. with luck(运气好的话);选项C. with ease(熟练地,轻而易举地);选项D. at best(顶多,至多)。所以,根据句意,选C。【参考译文】她准备得很充分,轻而易举地通过了这个充满挑战性的考试。
