1.他的演说涉及到英国英语和美国英语的不同之处

1.
His lecture was about the differences between British English and American English.
2.
Among those stories,this has the most surprising ending.
3.
How long have you been together?
4.
That blind was knocked down when crossing the street.
5.
It's you who made our show so successful.
6.
The police is fighting with the robber.
7.
They're still angry with each other.