N3 — outside your level filter
write + do — a rule or instruction set down in writing
kaku koto
do — a rule or instruction set down in writing
meaning: write
使った道具は、必ず元の場所に戻すこと。
tsukatta dougu wa, kanarazu moto no basho ni modosu koto.
Always return tools you have used to the place they came from. formal
会場では、携帯電話の電源を切ること。
kaijou de wa, keitai denwa no dengen o kiru koto.
Mobile phones are to be switched off inside the hall. formal