The water from the mountain stream was * ____, without any contaminants or pollution. The factory was fined for releasing * ____ chemicals into the river, causing environmental damage. The * ____ of gold is measured in karats, with 24 karat gold being the most pure. To make the water safe for drinking, we need to * ____ it by filtering out any harmful substances. The process of * ____ removes impurities from the water, making it clean and drinkable

pure, impure

さんの投稿です
印刷
埋め込み

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?