The exercise indicates a question. Shouldn't the correct answer be "were Matēj and František talking about their grandmothers"?
Not necessarily. Google 'declarative question.'
Does it have to be "were talking", or is "talked" also acceptable here?
It is acceptable.
"Matěj and František spoke about their grandmothers" was marked wrong and yet the dictionary hint was "spoke"
We do already accept many translations with "speak". Did ... speak Were ... speaking and similar.
We might be missing the affirmative order. Unfortunately, we have no recent reports for that, everything is a year old or older.
Hi, I reported it right after I posted about it. Maybe you were too quick :)
Due to some technical problems we haven't been receiving reports from web for some time.