Exercício: Dar respostas em inglês

Olá Guys,

Gostaria de saber se as respostas estão correta:

What are you doing now ?
I'm exercise review now.

How many eggs are there in a dozen eggs ?
There are twelve eggs. or There are twelve eggs in a dozen eggs.

How many eggs are there in your shopping list ?
There are twelve eggs in your shopping list. or There is a dozen eggs in your shopping list.

Thank you.