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

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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 having been

答案B

解析 本题主句的谓语动词is为一般现在时,而在that引导的同位语从句中,谓语动词的 could be frightened却与其不一致,这时就必须考虑虚拟语气的问题。在非真实条件句中,虚拟语气将来时的形式之一是should+主语+动词原形;若连词汀省略,则主谓语部分倒装,成为should+主语+动词原形。B选项与此相符,为正确答案。
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