29. It takes the Chăm up to 15 days to make a special piece of cloth.

- S + spend ( chia ) + time + V - ing: Dành bao lâu làm gì.

- = It takes ( chia ) + O + time + to V: Mất bao lâu để làm gì

30. She asked me where I was going to stay when I visited the Red Dao village.

- Tường thuật wh_q: S + asked + O + wh_q + S + V.

- Am / is / are going to -> was / were going to.

- HTD -> QKD

29. It takes the Chăm up to 15 days to make a special piece of cloth.

It takes + O + time + to V: mất bao nhiêu thời gian để làm gì 

30. She asked me where I was going to stay when I visited the Red Dao village.

S + asked + O + Wh + S + V (lùi thì)

TLG --> was/were + going to + V1 

HTĐ --> QKĐ

`color{orange}{~MiaMB~}`