Q1.

The committee has yet to decide whether the proposal ______ the company’s long-term strategy.
A. aligns
B. aligned
C. aligning
D. alignment

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Q2.

The marketing team will conduct a survey to determine customer preferences before ______ the new product.
A. launch
B. launched
C. launching
D. to launch

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Q3.

Only after the new software was installed ______ that the performance issues had been resolved.
A. they realized
B. did they realize
C. they were realizing
D. have they realized

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Q4.

The CEO requested that the report ______ by Monday morning.
A. is submitted
B. be submitted
C. was submitted
D. submits

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Q5.

The event was canceled ______ the unexpected power outage in the area.
A. because
B. due to
C. although
D. unless

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Q6.

The project manager emphasized that effective communication is ______ for successful teamwork.
A. essential
B. essentially
C. essentialness
D. essence

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Q7.

Employees are encouraged to participate in the workshop, ______ it is not mandatory.
A. because
B. unless
C. although
D. if

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Q8.

The finance department needs to finalize the budget proposal ______ Friday at the latest.
A. by
B. until
C. during
D. from

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Q9.

Having ______ extensive experience in data analysis, Ms. Suzuki was chosen to lead the research project.
A. has
B. have
C. having
D. had

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Q10.

The new intern proved to be ______ resourceful that the team assigned her to a key client project within a week.
A. so
B. very
C. too
D. such

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✅ 解答・詳細解説（＋目標スコア）

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Q1 → A. aligns

🎯 目標スコア：900点
「whether＋S＋V」節の中で、主語は“the proposal”。
動詞 “aligns” が正しい形。動詞一致を問う問題。

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Q2 → C. launching

🎯 目標スコア：850点
前置詞 “before” の後は名詞または動名詞。
→ “before launching the new product” が自然。

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Q3 → B. did they realize

🎯 目標スコア：950点
倒置構文。「Only after～」で始まる文では助動詞＋主語の倒置が必要。
→ “did they realize” が正解。

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Q4 → B. be submitted

🎯 目標スコア：900点
“request that＋主語＋原形動詞” → 要求・命令を表す仮定法現在。
→ “be submitted” が正しい。

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Q5 → B. due to

🎯 目標スコア：850点
名詞（power outage）を受ける原因表現は “due to”。
“because” は節を導くので不適。

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Q6 → A. essential

🎯 目標スコア：800点
be動詞の補語に形容詞。“is essential”＝「不可欠である」。
副詞や名詞形では不自然。

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Q7 → C. although

🎯 目標スコア：900点
前後の文脈「奨励されているが、必須ではない」。
逆接を表す “although” が最適。

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Q8 → A. by

🎯 目標スコア：750点
期限を示す前置詞は “by”。
“until” は「〜まで続く」の意味なので誤り。

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Q9 → D. had

🎯 目標スコア：950点
「Having＋過去分詞」＝完了分詞構文。
「豊富な経験を持っていたので」→ “Having had extensive experience”。

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Q10 → A. so

🎯 目標スコア：900点
構文 “so + 形容詞 + that SV”＝「とても〜なので…」。
→ “so resourceful that the team assigned her〜”。

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🧠 総評

このセットでは、倒置・仮定法現在・完了分詞構文・接続詞と前置詞の使い分け など、Part 5で頻出の高難度テーマを網羅。
900点以上を狙うには、単なる語彙暗記ではなく 文構造の瞬間認識力 が必須です。

特に「Only after」「request that＋原形」「Having＋過去分詞」などの定型構文は即答できるようにしましょう。