When you go to Paris, don't forget to visit Louvre and take boat trip along Seine

[quynhuyennhu]

Sentence is incorrect. Correct them, adding articles where necessary:
When you go to Paris, don't forget to visit Louvre and take boat trip along Seine

 

[Tdol]

This looks like homework.

 

[teechar]

Hello quynhuyennhu, and welcome to the forum.

As Tdol mentioned above, your question appears to be a homework task. If that's the case, then you need to do your own homework, submit it to your teacher and see what feedback you get from the teacher. If you're confused about the corrections/feedback you get from the
teacher, you can submit all that to the forum, and we'll be happy to help you.

Having said that, try putting the text below into Google and see if you can spot your mistakes. ;-)

visit Louvre and take boat trip along Seine

 

[emsr2d2]

Quynhuyennhu, note that I have changed your thread title. Titles should be unique and relevant to their thread. They should include some/all of the words/phrases you are asking us about.

 

[Tdol]

As a clue, you need to add three articles