"is" или "are"? dan and boris having an english lesson now? 2. my little kittens sleepping now? the girls playing with their dolls now? their parents going to greece now?

1. Are Dan and Boris having an English lesson now? 2. Are my little kittens sleepping now? 3. Are the girls playing with their dolls now? 4.Are their parents going to Greece now?

1. Are Dan and Boris having an English lesson now? 2. Are my little kittens sleepping now? 3.Are the girls playing with their dolls now? 4.Are their parents going to Greece now?

Are используется с местоимениями или существительными во множественном числе.