1.
The manager asked all employees to submit their monthly reports _____ Friday afternoon.
A. by
B. until
C. during
D. within
2.
The new smartphone model is popular because it is more durable _____ the previous version.
A. as
B. than
C. of
D. from
3.
All customers must show a valid ID when _____ into the event hall.
A. enter
B. entering
C. to enter
D. entered
4.
Mr. Kim was promoted to team leader _____ his outstanding performance last year.
A. despite
B. because
C. due to
D. although
5.
The company plans to launch a new product line next month, _____ is expected to increase sales significantly.
A. which
B. that
C. who
D. where
6.
Please make sure that all lights are turned off before you _____ the office.
A. leave
B. leaving
C. left
D. will leave
7.
The advertising campaign was not as effective as the team had _____.
A. expect
B. expected
C. expecting
D. to expect
8.
Employees are encouraged to submit suggestions that may help _____ workplace efficiency.
A. improving
B. improved
C. improve
D. to improving
9.
The final decision will be made after the board members have reviewed all the _____ data.
A. relevance
B. relevant
C. relevancy
D. relevances
10.
Due to a system error, some customers experienced delays, but the issue has now been fully _____.
A. resolve
B. resolving
C. resolved
D. resolves
✅ 【解答 & 詳しい解説（＋推奨スコア）】
1. 正解：A（推奨スコア：600点）
“by Friday”＝金曜日までに（締め切り）。
“until” は「〜までずっと続く」という意味で不適。
2. 正解：B（推奨スコア：600点）
比較級 → more durable than がセット。
“as”は同等比較のとき。
3. 正解：B（推奨スコア：650点）
前置詞 when の後 → 主語省略の 動名詞（entering） が自然。
4. 正解：C（推奨スコア：650点）
「〜が理由で」＝ due to。
“because”は接続詞なので文構造が変わってしまう。
5. 正解：A（推奨スコア：700点）
先行詞は「product line（物）」 → 関係代名詞 which。
6. 正解：A（推奨スコア：600〜650点）
未来のことでも 時・条件を表す副詞節では現在形 を使う。
before + you leave 〜
7. 正解：B（推奨スコア：700点）
had expected（過去完了）＋比較の慣用。
The campaign was not as effective as they had expected.
8. 正解：C（推奨スコア：650点）
help の後は 動詞原形。
help improve 〜（to はあっても良いが省略が一般的）
9. 正解：B（推奨スコア：700点）
名詞 data を修飾するのは形容詞 relevant。
10. 正解：C（推奨スコア：600〜700点）
has been fully resolved → 受動態の過去分詞。
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