"他们是哪国人？"

Translation: What country are they from?

[LiKenun]

Literally: they are which country’s people?

[Pixsword]

Exactly

[mauriciopozuelo]

What country and which country should both be accepted

[Juzin1]

It should be
Where are they from

[YanxiZhu1]

No. 哪国 means which country.

[Ju-carolina]

Why "which country" is not right?

[brian.jh.woo]

Should there be a "ma" at the end of the sentence?

[TARDISToni]

No, because 哪 ("which") is a question word. When you have a question word in the main sentence, you don't combine it with a question particle (like 吗 or 呢). You use one or the other; not both.

[Jill356237]

吗 is only used for questions that can be answered with yes/no. It turns a statement into a question basically. But when youre asking for a more elaborate answer you need a question word such as 什么 (what), 多少 (how much/many), or 哪 (where/which)

[steqz]

I have the same question !

[allison.hu2]

哪(na3) already inducates it is a questional sentence.
Other example，我在哪里？where am I?
他在哪里？Where is he?
Declarative sentence:他在英国。 He is in UK. If we want to turn it into question, we should add 吗？ Then we will get 他在英国吗？ Is he in the UK?
他在英国的哪？ Where is he in the UK? We want to know the specific area that he stay in UK.

[Annabelle55555]

Thats what I though too

[PolyGoat8]

is it ever correct to put 哪 at the end of the sentence?

[MattGriffi19]

Good question

[Cassidy259215]

'The guys' are they so it should work

[may697723]

Proper English dhould say 'which country are they from'

[Asahel819796]

Why is which country not right?

[Ella_Hillebrand]

Why is which country are these individuals from not correct?

[Vern572928]

她们是哪国人？Was this marked incorrect because the "Tā" was female?

[JeanneMPN]

Ta1-men is 'they'. That form of ta1 does indicate that the group is entirely female.

[adzlan89]

Can't it consider, which country are they from?

[Evan911291]

I'm hearing "daa" not "naa" and the "ren" also seems quite off.

[JoeOklahoma]

Same! At least as far as the da / na. And another similar question has others in the comments also hearing da. I understand they're speaking quick, but in this context should really emphasize the consonant for learning.

[julien.malard]

他们是哪国人？

[Kot439602]

我不知道

[RaffaellaS722783]

Does somebody know why they don't put "ge" after "na3"?

[H_Unlimite]

Cant tell if 她 or 他 in a listening exercise, really annoying

[MiloLako]

Should "What countries are they from?" be accepted?

[BobMason2]

Guys we don't use 吗 bcz we hsve 哪.. is that right?

[RaffaellaS722783]

Yeah, that's right. 哪 is interrogative itself

[mari84lc]

Where are they from?

[Tomasz931714]

for the answers... the authors insist on one fixed word order which is not a rule in English at all.

[crazyli825]

Doesn't this actually mean "What nationality are they?"
"What country are they from?" would be more like "他们是哪国的？"