総合問題 総合29
🎯 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 / 2関係詞
Lv.10 XP
I can't understand the reason ( ) he decided to quit his job so suddenly.
▶ 図解で理解する
Q2 / 2語彙総合words
Lv.10 XP
Many people prefer to use digital maps on their smartphones instead of paper ones ( ) because they are much more convenient to carry.