The police instituted an inquiry into cause of the accident.
警方开始调查事故的原因。
The police instituted an inquiry into the cause of the accident.
警方开始调查事故的原因。
They instituted an inquiry into the causes of the accident.
他们开始调查这一事故的原因。
The police instituted an inquiry into the cause of the accident.
警察着手调查这次事故的起因。
The police instituted an inquiry into the cause of the accident.
警察着手调查这次事故的起因。
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