"Koho měli zvolit?"

Translation: Who should they have elected?

[Praha2017]

The female version ""Koho měly volit" gets marked here as even wrong (in many other translations the male-female ending problem is considered as a typo mistake, buggy). Oh Duo ... :-)

[Alchamei]

'Měly' could be used as well, but 'zvolit' is better in this case.