Here's the answer:
“とても人気なツアーです”
(totemo ninki na tsuā desu)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- すごく人気なツアーです
- すっごく人気なツアーです
Fun fact: the hundreds of thousands of people learning Japanese with Memrise get this phrase correct 90.62% of the time!
