TOEIC Part 5 練習問題 P5_183
------- a sudden drop in temperature, the outdoor event had to be relocated indoors.
✅ 正解：Owing to
✅ 正解根拠:a sudden drop という名詞句を伴い、理由を表す群前置詞 Owing to が正解。
🎯 秒解きポイント:Owing to = Because of / Due to。後ろが名詞句で理由を表す文脈ならこれらを選ぶ。