Отметьте грамматически правильные предложения.
a. They are my children.
They are my child
.b. It’s a American car.
It’s an American car.
c. There is seven men in the street.
There are seven men in the street
.d. I’ve got a three black cats
.I’ve got three black cats.
e. Has your sister got a boyfriend?
Have your sister got a boyfriend?