There is a real possibility that these animals could be frightened, ______ a sud

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

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

答案 B

解析根据题干可知，a sudden loud noise是these animals...frightened产生这种结果的一个条件，从而排除C 和D 。A 不符合语法规则，而B 是一个省if的倒装的虚拟条件句，可还原为if there should be...，符合题意，故为答案。

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