1. Who goes on International Young Pioneer Organization expeditions?
⇒The young people of different nationalities.
2. How many expeditions are there every year?
⇒ There are ten expeditions every year.
3. How long does each expedition last?
⇒Each expedition lasts for ten weeks.
4. What do the volunteers help the scientists?
⇒Volunteers help scientists study the environment.
5. Which language must we know to become a volunteer?
⇒ We must know some English to become a volunteer.
