verb to be exercises

I ____________________ 16 years old .
They ____________________ Mexican .
My aprents ____________________ not married anymore .
We ____________________ from China .
It ____________________ ok , you can eat that cookie .
She ____________________ an english teacher .
My parents ____________________ engineers on an important factory .
I ____________________ at home now .
Is he a doctor ?
Are we the only ones ?
She ____________________ ____________________ a student anymore .
we ____________________ ____________________ hapy with you , because you are a really bad person .
It ____________________ more important to bring an unbrella .