Question

complete with "one" or "ones"
A: Which earrings are you going to buy?

B: The silver (вствь слово), i think. I like them better/

A: Yeah, the gold (вставь слово) don't match your clothes

Answer 1

one - заменяет сущ в ед ч  

ones - заменяет  существительное в мн ч

A: Which earrings are you going to buy?

B: The silver  ONES (silver earringS), i think. I like them better/

A: Yeah, the gold ONES (gold earringS) don't match your clothes

Answer 2

Ones
Ones
Both are plural- earrings.