`36`. How long did it take Pao to make this musical instrument?

`->` How long + do/does + it take + O + to-V?

`37`. He is keen on playing basketball.

`->` S + be + keen on + V-ing: thích làm gì

`38`. Nam missed the most important part of the festival because he arrived late.

`->` S + V + because + S + V: ... bởi vì ...

`39`. Tet is an occasion reunion for family.

`->` HTĐ: S + am/is/are

`->` an + N-số ít bắt đầu bằng nguyên âm

`40`. According to the traditions, you must respect the old people.

`->` According to sth: theo

`->` S + must + V-inf: phải làm gì