🧵 接続詞 ・ ヒナ
TOEIC Part5文法問題 ヒナ: Q31（接続詞）
Our production costs have decreased ___ we adopted the new process.
Our production costs have decreased ___ we adopted the new process.
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正解: A) since
What follows the blank is the clause 'we adopted the new process'. Among conjunctions that take a clause, 'since' (meaning 'because'/'ever since') fits the meaning — it can also be read as a starting point in time. 'For' can act as a coordinating conjunction expressing reason, but it normally needs a comma before it, which is awkward here. 'During' and 'despite' are prepositions and can't take a clause.