Here are the correct options for the blanks in the passage:

11. **A. place**
12. **C. celebrate**
13. **C. part**
14. **B. are**
15. **A. candied**

So the completed sentences would read:

"We are happy to announce the 2023 Hiền Lương Village Tết Festival will take **place** on Lê Duẩn Street from January 21 to January 29 from 8 a.m. to 10 p.m. Come and **celebrate** the 2023 Hiền Lương Village Tết Festival next Saturday. This is a free event for everyone. There **are** lots of activities and types of traditional food to enjoy. ... Watch the crazing works show an Tết Eve from Hiền Lương Bridge. Enjoy different types of traditional Tết food like bánh chưng or **candied** fruit. Bring your family and friend!"