Sure! Here are the corrections for each sentence:

1. Khue Van Pavilion is regarded **by** the symbol of Ha Noi.
Correction: **as** ==> **the symbol of Ha Noi**

2. Today, the Temple **was considered** one of the most popular tourist attractions.
Correction: **is considered** ==> **one of the most popular tourist attractions**

3. The Imperial City of Hue was finally **complete** under the reign of King Minh Mang.
Correction: **completed** ==> **under the reign of King Minh Mang**

4. The students were not interested in history because it was **bored**.
Correction: **boring** ==> **because it was boring**

5. Tourists should add the Temple of Literature to their **visit list** in Hanoi.
Correction: **visit list** ==> **list of visits**

6. You’d better **to take** your raincoat because it’s going to rain.
Correction: **take** ==> **not to take**

7. The **Doctors’** stone tablets **was** first erected by King Le Thanh Tong.
Correction: **Doctors'** ==> **Doctors**; **was** ==> **were**

Please let me know if you need further assistance!