some corrections/suggestions;
question 1 - it would be the scissors ARE broken (not is broken), since scissors are plural. if you were saying 'the pair of scissors', it would be is.
question 4 is a pretty badly phrased sentence, but it would be 'we are poorer than them' or 'we are poorer than they (are)'. without the 'are' at the end the second option doesn't make much sense outside of old English.
question 6 - I don't think 'sought' would be commonly used. It'd probably be 'searched', so 'He searched (far and wide) for his missing friend'/'He searched for his missing friend far and wide'. (the first sentence I put makes more sense/would be more commonly used, I think)
question 11 would probably be better off as 'one should not waste their time' as opposed to 'one's time'. alternatively 'one shouldn't waste time (on)' would work.
It's a good concept, don't get me wrong. Just might need a little bit more checking with other native English speakers.