If John had entered the office ten minutes ago, he________ what we were talking about just now.

A．should know

B．had known

C．would know

D．would have known

查看答案及解析进入在线模考

参考答案

答案解析

考查虚拟语气。
句意：如果约翰十分钟前进办公室，他就会知道我们刚才在说什么了。本句为if引导的虚拟条件句，根据从句中的时间状语ten minutes ago可知，该句表示与过去事实相反的假设，因此条件从句的谓语用过去完成时(had+过去分词)，主句谓语用“should／would／could／might+have+过去分词” ，故选D。

你可能感兴趣的试题

1 Your brother Frank doesn' t eat cheese,________?

A．is he

B．isn' t he

C．does he

D．doesn' t he

查看解析在线模考

2 Pets________constant care are not suitable for people with little spare time.

A．require

B．requiring

C．required

D．to require

查看解析在线模考

3 Newspapers, magazines, televisions and computers all fight to________our attention.

A．hold

B．bring

C．carry

D．pull

查看解析在线模考