they are Customs officer。就划线部分提问。划线部分为海关官员

They are watching TV.\uff08\u5bf9\u5212\u7ebf\u90e8\u5206\u63d0\u95ee\uff09 are watching TV

What are they doing?

\u5e94\u8be5\u662f\u6d77\u5173\u7684\u5b98\u5458\uff0c\u56e0\u6b64\u662fcustoms' officer\u5427

What are they?
他们是做什么工作的？

或者

What do they do?
他们是做什么工作的?

这是针对职业提问，所以有几种问法。1.What are they? 2.What are their jobs? 3. What do they do?

他们负责进出口业务

what are their job/profession?

who are them？

who are they ? what are their job ?

扩展阅读：xbox series x ... they are sunday ... dancing with your ghost ... they are billions ... old habits die hard ... this war of mine ... total commander ... to the moon and back ... they are empty ...