Q1.
The conference room must be cleaned ______ the next meeting begins.
A. during
B. before
C. since
D. while
Q2.
Ms. Tanaka was praised for her ______ handling of customer complaints.
A. effect
B. effective
C. effectively
D. effectiveness
Q3.
All applicants must submit the required documents ______ Friday.
A. until
B. during
C. by
D. for
Q4.
The manager asked the team to complete the report as ______ as possible.
A. quick
B. quickly
C. quicker
D. quickest
Q5.
The new software update will help reduce operating costs ______ improving efficiency.
A. but
B. so
C. or
D. while
Q6.
Mr. Lee has worked for this company ______ more than ten years.
A. since
B. during
C. for
D. from
Q7.
The seminar was postponed due to ______ attendance.
A. low
B. lower
C. lowest
D. lowering
Q8.
Please ensure that all forms are filled out ______ before submission.
A. accuracy
B. accurate
C. accurately
D. accurateness
Q9.
The company decided to expand its business ______ demand continues to grow.
A. although
B. because
C. unless
D. until
Q10.
Employees are encouraged to share their ideas, ______ they are not fully developed.
A. even if
B. so that
C. as long as
D. in case
✅ Answers・詳しい解説・目安スコア
Q1 → B（before）
🎯 目安スコア：500点
👉 「次の会議が始まる前に」
→ 時を表す接続詞 before が正解。
Q2 → B（effective）
🎯 目安スコア：600点
👉 handling（名詞）を修飾
→ 形容詞 effective。
Q3 → C（by）
🎯 目安スコア：550点
👉 締切
→ by + 期限 が定番。
Q4 → B（quickly）
🎯 目安スコア：500点
👉 complete（動詞）を修飾
→ 副詞 quickly。
Q5 → D（while）
🎯 目安スコア：650点
👉 「コストを下げながら効率を上げる」
→ 同時進行＝while。
Q6 → C（for）
🎯 目安スコア：500点
👉 期間（more than ten years）
→ for + 期間。
Q7 → A（low）
🎯 目安スコア：600点
👉 attendance（名詞）を修飾
→ 形容詞 low。
Q8 → C（accurately）
🎯 目安スコア：550点
👉 filled out（動詞）を修飾
→ 副詞 accurately。
Q9 → B（because）
🎯 目安スコア：600点
👉 需要が伸びている理由で拡大
→ because。
Q10 → A（even if）
🎯 目安スコア：650点
👉 「完全じゃなくても」
→ 譲歩の even if。
✍️ Part 5 超重要ポイント
- 動詞を修飾 → 副詞
- 名詞を修飾 → 形容詞
- by / until / for / since は頻出
- 接続詞は 意味で判断
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