It's $12.99.
How much is it / this / that?
My, very
My dog is very big.
Eat / eating breakfast
Someone who helps doctors (don't forget "a" or "an")
A nurse
Beth is 16 years old.
I work for a construction company.
What do you do?
September, school
I start school in September.
Watch / watching a movie
A woman in TV or movies (don't forget "a" or "an")
An actress
She likes playing basketball and watching TV.
I'm hanging out with my friends.
What are you doing? OR Who are you hanging out with?
There, under, desks
There are desks under the lights.
Play / playing the violin
Someone who helps others learn new things (don't forget "a" or "an")
A teacher
But now she is sad. She doesn't have a lot of friends, and is often bored.
I like Chinese, American, Turkish, and Brazilian food.
What kind of food do you like?
Their, watch (present continuous), dogs, park
Their dogs are watching the birds in the park.
Look / looking for your keys
Someone who designs and builds things (don't forget "a" or "an")
An engineer
She doesn't know what to do. She tries taking a walk, reading books, and eating snacks.
I go skiing every winter.
How often do you go skiing?
Siblings', snow, toys, to be (present continuous)
The siblings' toys are in the cold snow.
Leave / leaving your bags on a train
Someone who works with many other people and helps put things together
A factory worker
After six days, she finally feels better. She decides to make friends at work and meet new people on apps!