🔗 前置詞 ・ リン
TOEIC Part5文法問題 リン: Q61（前置詞）
The quarterly report must be submitted ___ the fifth of each month.
The quarterly report must be submitted ___ the fifth of each month.
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正解: C) by
The meaning is 'must be submitted by the fifth of each month' — a deadline, so 'by' is correct. 'Until' means 'continuously up to' and doesn't fit well with a one-time action like 'submit'. 'In' marks a span, and 'at' marks a clock time. 'By' = completion, 'until' = continuation is the key distinction being tested.