600点 文法問題 接続・前置詞 within TOEIC Part 5 練習問題 P5_523 The shipment is expected to arrive ------- three business days. A. within B. between C. at D. among ✅ 正解：within ✅ 正解根拠:within+期間。 🎯 秒解きポイント:within=期間内。 文法問題 接続・前置詞 within