[文法] never 的附加問句

[Miere (新年快樂)]

A diamond ring is NEVER cheap,______ it?->the answer is ?
3Q

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→ monkeywife:只要出現否定詞( no, never, nothing, nobody )
→ monkeywife:附加問句就是用肯定 所以這句應該是is it?