Will/ be going to, please help me

[Tuyet89]

1. Peter: " Mary is in the hospital. " Anna :" Oh, really. I didn’ t know’ - I will go / am going to go to visit him"

2. Sugar is the chief cause of teeth or tooth decay.

3. I like to see " Tom and Jerry" on Saturday. That 's my favorite.

4. what is the price to mail/ of mailing a letter to the USA?

[Torsten]

@Tuyet89

Peter: " Mary is in the hospital. " Anna :" Oh, really. I didn’ t know’ - I will go / am going to go to visit him"

There are a number of options here and you will learn more about them if you read The Future Tenses.

@Tuyet89

Sugar is the chief cause of teeth or tooth decay.

Sugar is the chief cause of tooth decay.

@Tuyet89

I like to see " Tom and Jerry" on Saturday. That 's my favorite.

I**'d** like to see " Tom and Jerry" on Saturday. That 's my favorite.
Or: I like watching ‘Tom and Jerry’ on Saturdays. That’s my favorite cartoon.

@Tuyet89

what is the price to mail/ of mailing a letter to the USA?

How much does it cost to mail a letter to the US?