Stanza's are the building blocks of formal poetry, like paragraphs in a story or verses in a song.
In order to replace the infinitives with gerunds, all main verbs or actions need be have the -ing ending and eliminate the word "to". The sentence should be revised in the following way:
Hosting a party of this magnitude requires cleaning and organizing the house before getting to the part of adding decorations to the rooms.
My cat is probably hiding somewhere in the flat it might be under my bed or we may find it in the balcony
The answer is D: The language explains exactly what is so attractive and available for sale in Nebraska :)