Question

_____there be a flood this summer, what would we do?

A．Should

B．Would

C．If

D．Will

Answer 1

A

 在虚拟条件句中, 从句中如有 had, were, should, 这时if可以省略, 把had, were, should提前, 故答案为A。若选C项, 应把be改为were。