🎯 副詞 ・ カエデ
TOEIC Part5文法問題 カエデ: Q78（副詞）
The two departments worked ___ to complete the project ahead of schedule.
The two departments worked ___ to complete the project ahead of schedule.
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正解: B) closely
The blank modifies the verb 'worked', so the adverb 'closely' (in close cooperation) is correct — 'work closely with' is also a set phrase meaning 'to cooperate closely with'. 'Close' as an adverb refers to physical distance (stand close), while cooperative relationships use 'closely'. 'Closer' is the comparative, and 'closeness' is a noun.