Q1
The marketing report was completed ahead of schedule, ______ all members of the team contributed equally.
A. although
B. since
C. unless
D. whether
✅ 正解：B. since
📘 解説： 「全員が平等に貢献したので予定より早く完成した」＝理由を表す“since”。
🎯 目標スコア：750点以上
Q2
All employees are encouraged to submit their ideas for improving efficiency, ______ they are related to current projects or not.
A. whether
B. although
C. unless
D. since
✅ 正解：A. whether
📘 解説： “whether … or not” は「〜かどうかに関係なく」。条件節ではない。
🎯 目標スコア：800点以上
Q3
The CEO insisted that the proposal ______ reviewed again before final approval.
A. is
B. was
C. be
D. will be
✅ 正解：C. be
📘 解説： “insist that + 主語 + 動詞原形” は仮定法現在。提案・要求・主張を表す動詞。
🎯 目標スコア：850点以上
Q4
Our company’s new data system is designed to automatically back up files every hour to prevent any data ______.
A. lose
B. losing
C. loss
D. losses
✅ 正解：C. loss
📘 解説： “data loss” は定型表現。不可算名詞なので単数形でOK。
🎯 目標スコア：750点以上
Q5
The board members will review the merger proposal at next week’s meeting, but a decision ______ until the financial report is finalized.
A. will make
B. is made
C. will not be made
D. not making
✅ 正解：C. will not be made
📘 解説： 受け身構文 “will not be made”。「決定は下されない」。
🎯 目標スコア：800点以上
Q6
Please ensure that all customer inquiries ______ within 24 hours.
A. answered
B. will answer
C. are answered
D. to answer
✅ 正解：C. are answered
📘 解説： 「〜が回答される」→受け身。主語が “inquiries” なので “are answered”。
🎯 目標スコア：700点以上
Q7
Despite initial skepticism, the company’s new line of eco-friendly products has been ______ received by the public.
A. warmly
B. warm
C. warmth
D. warming
✅ 正解：A. warmly
📘 解説： 「温かく受け入れられた」＝副詞 “warmly” が正しい。
🎯 目標スコア：800点以上
Q8
The research team is exploring several methods to make the production process more ______.
A. efficiently
B. efficiency
C. efficient
D. efficiencies
✅ 正解：C. efficient
📘 解説： “make + 名詞 + 形容詞” の構文。形容詞 “efficient” が正解。
🎯 目標スコア：650点以上
Q9
It was not until the new regulations were introduced ______ the company began to change its safety policy.
A. when
B. that
C. which
D. who
✅ 正解：B. that
📘 解説： “It was not until … that …” 構文。「〜になって初めて…した」。
🎯 目標スコア：900点以上
Q10
The manager’s decision to delay the product launch was made ______ consultation with the development team.
A. on
B. under
C. in
D. for
✅ 正解：C. in
📘 解説： “in consultation with”＝「〜と協議して」。熟語の暗記が鍵。
🎯 目標スコア：850点以上
🧠 総評
このセットは上級者向け。
仮定法・受け身・構文表現・熟語の知識を組み合わせて解く力が必要です。
900点以上を狙う人は、文法パターンを瞬時に判断できるように練習しましょう。
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