a set of keys 作主语时,谓语动词用单数对吗
问题描述：
a set of keys 作主语时,谓语动词用单数对吗
答
我怎么觉得用单数呢，表示一套
A set of samples is enclosed here.
随信附上一套样品。
答
a set of keys 作主语时,谓语动词用复数.