Here are the verbs in the correct forms:

1. Some flowers **were bought** for his mother on her birthday yesterday. (BUY)
2. Tickets for the football match **are being sold** at the ticket booth. (SELL)
3. Huong Pagoda Festival **is visited** by thousands of tourists during the first three months of the Lunar Year. (VISIT)
4. Our school **is named** after a great scholar of our country - Le Quy Don. (NAME)
5. My Son Sanctuary **is located** in Duy Xuyen District, Quang Nam Province. (LOCATE)
6. The students of the Imperial Academy **were selected** carefully from local examinations all over the country. (SELECT)
7. Harvard **is considered** the oldest university in the USA. (CONSIDER)