idiom
語彙総合 熟語4
単語の使い分けと語法
🎯 確認クイズ（2/10問）
正解 +10 XP。単元完了（全問クリア）で +80 XP ボーナス。
Q1 / 2idiom
Lv.10 XP
The library has a strict rule that you must ( ) all borrowed books within two weeks, or you will have to pay a fine.
Q2 / 2idiom
Lv.10 XP
The local government has decided to ( ) a new recycling system next month to reduce the amount of waste in our town.