`text{1. }`Yes it is.

`text{2. }`The most valuable possessions of Mongolian nomads are their tents and cattle.

`text{3.}` Because there are dramatic changed in weather conditions between seasons in Mongolia.

`text{4. }`They often move up a hill in fall.

`text{5.}` They move at least four times a year.

`text{6}`. Because they want to look for an education and a professional job.

1. it is true (câu 2)

2. they're their tents and cattles (câu 4)

3. Cuz there are dramatic changes in weather conditions between seasons (câu 6)

4. they move to the mountains (câu 9)

5. 4 times a year (câu 10)

6. cuz they want to look for an education and a professional job (câu 2 đoạn 2)