`49`. Do the ethnic minority in Vietnam often live in mountainous areas?

`50`. Are their costumes colorful and unique?

`51`. Do they often gather together at the communual house in special occasions?

`52`. Do ethnic people often hold festivals in spring?

`53`. Does life in the mountainous areas is quite difficult because of the extreme weather?

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`***` Yes/No Question ở HTĐ:

`-` Với động từ thường:

`+` Hỏi: Do/Does + S + V-inf?

`+` Trả lời:

`@` Yes, S + do/does.

`@` No, S + do/does + not.

`-` Với động từ tobe:

`+` Hỏi: Am/Is/Are + S?

`+` Trả lời:

`@` Yes, S + am/is/are.

`@` No, S + am/is/are + not.