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It took a long time the chemical works was closed down. [ ] A. afterB. sinceC. u

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It took a long time the chemical works was closed down. [ ] A. afterB. sinceC. u

It took a long time _________ the chemical works was closed down.

[]

A. afterB. sinceC. untilD. before

试题答案

答案：D

标签：thechemicalworkstimeit

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