Q1.
The marketing report must be submitted ______ the end of this week.
A. until
B. during
C. by
D. for
Q2.
Ms. Brown was promoted because of her ______ performance over the past year.
A. impress
B. impressed
C. impressive
D. impressively
Q3.
All employees are required to follow the company’s safety ______.
A. instruct
B. instruction
C. instructing
D. instructions
Q4.
The new policy will take effect ______ April 1.
A. in
B. at
C. on
D. during
Q5.
The assistant answered the customer’s questions ______ and politely.
A. clear
B. clarity
C. clearly
D. clearness
Q6.
Mr. Davis has been in charge of overseas sales ______ 2019.
A. for
B. during
C. since
D. from
Q7.
The seminar was canceled ______ the speaker became ill.
A. although
B. because
C. unless
D. while
Q8.
Please review the document carefully to avoid any ______ errors.
A. unnecessary
B. unnecessarily
C. necessity
D. necessitate
Q9.
The company plans to expand its operations ______ demand continues to increase.
A. so that
B. unless
C. because
D. even if
Q10.
Employees are encouraged to submit their feedback, ______ it is anonymous.
A. in case
B. even though
C. so that
D. as if
✅ Answers・詳しい解説・目安スコア
Q1 → C（by）
🎯 目安スコア：500点
👉 締切表現
→ by + 期限 は超頻出。
Q2 → C（impressive）
🎯 目安スコア：600点
👉 performance（名詞）を修飾
→ 形容詞 impressive。
Q3 → D（instructions）
🎯 目安スコア：550点
👉 safety instructions（安全指示）
→ 複数形が定番コロケーション。
Q4 → C（on）
🎯 目安スコア：500点
👉 April 1（具体的な日）
→ on + 日付。
Q5 → C（clearly）
🎯 目安スコア：500点
👉 answered（動詞）を修飾
→ 副詞 clearly。
Q6 → C（since）
🎯 目安スコア：550点
👉 2019（起点）
→ since + 時点。
Q7 → B（because）
🎯 目安スコア：600点
👉 キャンセルの理由
→ because。
Q8 → A（unnecessary）
🎯 目安スコア：650点
👉 errors（名詞）を修飾
→ 形容詞 unnecessary。
Q9 → C（because）
🎯 目安スコア：600点
👉 需要増加が理由
→ because。
Q10 → B（even though）
🎯 目安スコア：700点
👉 「匿名だけど」
→ 譲歩表現 even though。
✍️ Part 5 即効攻略メモ
- 名詞前＝形容詞
- 動詞修飾＝副詞
- by / since / for / on は毎回出る
- 接続詞は「意味」だけで判断
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