Watch out for these animals! They could be terrified a sudden loud noise.
A. being there
B. should there be
C. there was
D. there have been
网友回答
A. being there
(答案→)B. should there be
C. there was
D. there have been
解析：句意：小心这些动物！如果这里有一个突然的大的噪音，他们可能是非常害怕的。if引导虚拟语气，如果句中有should，可以将其提前，并将if省略，there be 表示有，故选B