Here's a short story:

Have you ever watched the big parade on Tian'anmen Square on October 1? Some students performed in the big parade. In order to get ready for it, this summer, many Beijing middle school students had a different kind of vacation. Instead of hanging out with friends or traveling, they trained hard for the 60th birthday of China this year. Students trained from 7:30 am to around 10:00 am or from 4 pm to 6:30 pm, because it was very hot this summer. They wore white hats, T-shirts and blue trousers. The hats and T-shirts were printed with a red logo, the number "60". The first week of training was PE. Students practiced standing and squatting. Then they moved on to practice the group show. When we watched the parade on TV we saw them making colorful pictures. What did the students think of their unusual summer? "Sometimes we find it a bit tiring." said Lu Wenqi, 13. "But most of us think it's a great _ to take part in such an important show." Li Hui, 15, thought the same as Lu. She said her classmates were hardly late for training. "It's a wonderful chance for us," said Li. "When my parents were in college, they also took part in a national day parade. Now it's my turn!" (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: How old is Li Hui?
Guess: 15

Question: what were the hats and shirts printed with?
Guess: the number 60

Question: in what color
Guess: red

Question: what color where the pants?
Guess: blue

Question: did the studetns like what they were doing?
Guess: yes

Question: how old is Lu?
Guess: 13

Question: are they often on time?
Guess: yes

Question: what had Li's parent's done?
Guess: took part in a national day parade

Question: what birthday are they celebrating?
Guess: China

Question: how old?
Guess: 60

Question: what could they have been doing instead?
Guess: hanging out with friends or traveling

Now answer the following question in the same format.

Question: what times were they practicing?

7:30-10:00 am, 4:00-6:30 pm