📝無料 TOEIC Part 5 練習問題（新作・10問）

Q1.
The conference room must be reserved ______ advance for large meetings.
A. on
B. in
C. at
D. by

Q2.
All employees are required to submit their expense reports ______ Friday.
A. until
B. during
C. by
D. for

Q3.
The manager suggested that the report ______ revised before submission.
A. is
B. was
C. be
D. being

Q4.
Ms. Lee is responsible ______ coordinating the marketing campaign.
A. of
B. for
C. with
D. to

Q5.
The new software update is designed to ______ overall system performance.
A. improvement
B. improves
C. improving
D. improve

Q6.
Due to the weather conditions, the outdoor event was ______ postponed.
A. brief
B. briefed
C. briefly
D. briefing

Q7.
Customers who sign up early will receive a ______ discount.
A. special
B. specially
C. specialty
D. specialize

Q8.
The company has experienced a significant ______ in online sales this year.
A. increase
B. increasing
C. increased
D. increasingly

Q9.
Please contact the IT department ______ you encounter any technical issues.
A. unless
B. although
C. if
D. while

Q10.
The training session was postponed ______ several key staff members were absent.
A. because
B. because of
C. despite
D. although

✅ 解答・詳しい解説（目安スコアつき）

in advance＝「事前に」。Part 5 超頻出コロケーション。

🎯 目安スコア：500点

by Friday＝「金曜日までに（期限）」
until は「ずっと〜まで」なので不適。

🎯 目安スコア：500〜550点

suggest that S (should) + 動詞原形
仮定法現在。TOEIC定番の文法ポイント。

🎯 目安スコア：650点

be responsible for 〜
前置詞セット問題。

🎯 目安スコア：550点

to + 動詞原形
designed to improve が自然。

🎯 目安スコア：550〜600点

動詞 postponed を修飾 → 副詞が必要。

🎯 目安スコア：600点

名詞 discount を修飾 → 形容詞。

🎯 目安スコア：500点

a significant + 名詞
experienced an increase（増加を経験した）

🎯 目安スコア：600点

「もし〜なら」＝条件文。
unless（〜でない限り）は意味がズレる。

🎯 目安スコア：500〜550点

because of + 名詞
several key staff members were absent → 名詞節。

🎯 目安スコア：600点