有 and 连接两个名词作主语 动词用单数？复数？

and 连接两个名词做主语时,谓语一般用复数。

如：The teacher and his son are picking apples now.

老师和他的儿子在摘苹果。

但是，如果两个名词若构成一个整体事物，谓语则用单数。

Fish and chips isvery famous food in England.

鱼和薯条在英国是一道名菜。