Question

Professor James will give us a lecture on the Western culture, but when and where ____ yet. ...

Professor James will give us a lecture on the Western culture, but when and where ____ yet. A．hasn’t been decided B．haven’t decided C．isn’t being decided D．aren’t decided

Answer 1

A

试题分析：考查时态和主谓一致。句子的主语是when and where指一件事情的两个方面，仍然使用单数形式。句意：James教授将会给我做一个关于西方文化的演讲，单数何时何地还没有确定。根据yet说明使用现在完成时。故A正确。 点评：当when and where做句子的主语时，谓语动词用单数的形式。