There is a possibility that these hens could be frightened and lay fewer eggs   

题型：不详难度：来源：

There is a possibility that these hens could be frightened and lay fewer eggs       a sudden loud noise.

A．should there be	B．there was
C．would there be	D．there having been

答案

A

解析

试题分析：考查虚拟语气中的倒装。根据语意，原句应为…if there should be a sudden loud noise，if虚拟条件句中有should时，可以把if省略，should提前，变成should there be 结构，据此选A.
点评：if的非真实条件句，可以用省略倒装句，省略if，将should，were，had提前，意思是一样的，就是更简洁。