It is后面可接复数名词吗 It is的用法

问题描述

_______ Mr Smith and his wife in the room.
我填的是 They are。但答案是 It is。但 it is 后面可以接复数名词吗？另外，请问我的答案也算对吗？谢谢

老师答疑

米老师：

可以，_______ Mr Smith and his wife in the room. 应该是强调句的省略形式，完整的句子是 It is Mr Smith and his wife (that / who...) in the room. 该句型一般用于强调句，例如：
It is the students that make me sad.
在强调句子主语时，强调句型结构不变，主语和其后的谓语搭配一致就行，又如：
My favorite food is dumplings.
主语 My favorite food 为不可数名词与谓语 is 搭配一致，表语为复数并不影响前面的 is。

张老师：

您这个题应该不太完整吧？若不完整请补充好吗？