There is a real possibility that these animals could be frightened, _____ a sudden loud noise.
A、being there
B、should there be
C、there was
D、there having been
【正确答案】：B
【题目解析】：should there be 这里是对将来的虚拟语气结构，只是省略了if后将should提前了。还原的话是 if there should be a sudden loud noise. 最好是不要替换，因为这里的这个结构是和前面的 could be frightened 一起的。
