やっと教室きょうしつが静しずまったね。

yatto kyoushitsu ga shizumatta ne.

The classroom finally quieted down. casual

騒さわぎは警察けいさつが来きてようやく静しずまりました。

sawagi wa keisatsu ga kite youyaku shizumarimashita.

The commotion finally died down once the police arrived. neutral