问they的th发什么音

发/ð/音pron. 他们；它们；她们They must reduce domestic demand .它们必须降低国内需求。

They declined to comment further .他们拒绝进一步发表评论。They spoke for 10 minutes .他们聊了10分钟。Why do they do this他们为什么要这样做？Do they want fair trade他们想要公平贸易吗？