Here are the suitable words filled in the gaps:

1. **dishes**
2. **pour**
3. **mix**
4. **chocolate**
5. **water**
6. **glass**
7. **cartons**
8. **tea**

The completed sentences would look like this:

Among many special **dishes** of Vietnam, my foreign friend likes beef noodle the best.
First, **pour** the egg into the pan and cook for about three minutes.
You can **mix** the meat with vegetables and a little pepper.
He gave me a bar of **chocolate** on Valentine’s Day.
There is orange juice, lemonade, milk, mineral **water**, coffee, and tea. Which kind of drinks do you prefer?
How many **cartons** of milk do you want to buy, mother?
I make him a **glass** of lemonade because he feels so hot today.
This morning, I didn’t have a cup of **tea** as usual.