I think "two kilos of THEM" should also be accepted.
Totally agree. We might of been talking about apples so "of them" would be right. Reported.
I reported it. Still not accepted 10 months later :(
I agree with all your comments and because it is a plural quantity in English grammatically it is preferable to use them not it or alternatively to translate it as simply two kilos. I will also report.
that's ridiculous. two kilos of pudding is plural but definitely not them. it could be them for two kilos of marbles, but it is definitely not always preferable.