Question

My cousins live in New York City. They ___ really cool! am is are

Answer 1

My cousins live in New York City. They are really cool!

Answer 2

Answer :

Is, am and are are all different forms of the verb 'to be.'

Cambridge English Dictionary defines 'is' as 'be, used with he/she/it.'

Cambridge English Dictionary defines 'am' as '(used with I) be.'

Cambridge English Dictionary defines 'are' as 'present simple of be, used with you/we/they.'

In the given sentence the cousins are referred to as 'they,' so 'are would be used to complete the sentence as follows :

My cousins live in New York City. They are really cool !