3 sentences

1. 这些是上好的龙井茶。

   zhè​xiē shì shàng​hǎo de lóng​jǐng​chá.

   This is top-quality Longjing tea.

   Source: Dong Chinese Dictionary

2. 这口棺材是用上好的红木制成的。

   zhè kǒu guān​cai shì yòng shàng​hǎo de hóng​mù zhì​chéng de.

   This coffin is made of high-quality mahogany.

   Source: Dong Chinese Dictionary

3. 这套精致的桌椅是由上好的楠制成的。

   zhè tào jīng​zhì de zhuō​yǐ shì yóu shàng​hǎo de nán zhì​chéng de.

   This exquisite set of tables and chairs is made of high-quality nanmu wood.

   Source: Dong Chinese Dictionary