More nurses is the next item on the agenda.
这里的谓语动词用单数可以有两种理解：
1. 将原句理解为倒装句：
More nurses is the next item on the agenda.
=The next item on the agenda is more nurses.
2. 将原句理解为在句首省略了the question of 或 the issue of：
More nurses is the next item on the agenda.
=The question / issue of more nurses is the next item on the agenda.
不过如果从“语法一致”的角度来考虑，原句用复数动词也是完全可以的：
More nurses are the next item on the agenda.
