ex 5.

3. Sarah is from Australia. She's australian.

4. Li Ping is from China. She (or) He(?) is chinese.

5.Vlad and Oksana are from Russian. They're russian.

6. Vlad and Sanjeet are from India. They're indian.

7. Hurry is from the USA. He is american.

8. Letcia and Pedro are from Mexico. They're mexican.

ex 7.

2. It's Australia.

3. first languages - it's French and second- it's English.

4. It's Moscow.

5.It's chinese.

6.Beijing in China.