There is a real possibility that these animals could be frightened,_____a sudden

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问题 There is a real possibility that these animals could be frightened,_____a sudden loud noise.

选项 A、there being
B、was there
C、should there be
D、there having been

答案 C

解析 should there be a sudden loud noise“如果突然出现巨大的响声”，这是省略if的虚拟条件句将来时，把助动词或情态动词提前，相当于if there should be a sudden loud noise。

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