Q1.
The marketing team will begin the new campaign ______ the results are approved by management.
A. before
B. since
C. once
D. during
Q2.
All personal information must be kept ______ at all times.
A. confidence
B. confidential
C. confidently
D. confide
Q3.
The CEO’s message was sent to all employees ______ email.
A. through
B. between
C. beside
D. across
Q4.
The hotel offers complimentary breakfast to all guests staying ______ two nights.
A. above
B. over
C. more
D. beyond
Q5.
The technician replaced the faulty cable to prevent the system from ______ down.
A. break
B. breaks
C. breaking
D. broke
Q6.
Customers who sign up for the monthly plan will receive a 20 percent discount ______ the first year.
A. at
B. over
C. for
D. beyond
Q7.
Mr. Wilson was promoted to supervisor ______ his outstanding performance last quarter.
A. due to
B. instead of
C. even though
D. apart from
Q8.
The software update will allow the device to run more ______ than before.
A. efficient
B. efficiency
C. efficiently
D. efficiencies
Q9.
The proposal was rejected because some important data ______ missing.
A. were
B. was
C. be
D. being
Q10.
To reduce costs, the company decided to purchase materials from a more ______ supplier.
A. compete
B. competition
C. competitive
D. competitively
✅ 解答・詳しい解説
Q1. 正解：C（once）
👉 once = 「〜したらすぐに」
条件節でよく使う定番表現。
🎯 目標スコア：650点
Q2. 正解：B（confidential）
👉 keep + 形容詞 → 「〜の状態に保つ」
「confidential（機密の）」が自然。
🎯 目標スコア：550点
Q3. 正解：A（through）
👉 through email / through a website = 「〜を通じて」
「メールで」が自然。
🎯 目標スコア：500点
Q4. 正解：B（over）
👉 over two nights = 「2泊以上」
ホテル関連でよく出る表現。
🎯 目標スコア：600点
Q5. 正解：C（breaking）
👉 prevent A from -ing
＝「Aが〜するのを防ぐ」
🎯 目標スコア：650点
Q6. 正解：C（for）
👉 for the first year = 「最初の1年間」
期間を表す定番。
🎯 目標スコア：550点
Q7. 正解：A（due to）
👉 due to + 名詞
「〜が理由で」
🎯 目標スコア：600点
Q8. 正解：C（efficiently）
👉 run efficiently = 効率的に動く
副詞が必要。
🎯 目標スコア：600点
Q9. 正解：A（were）
👉 data は集合名詞だけど TOEIC では「複数扱い」が基本。
→ the data were 〜
🎯 目標スコア：650点
Q10. 正解：C（competitive）
👉 competitive supplier = 競争力のあるサプライヤー
形容詞が自然。
🎯 目標スコア：600点
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