1.Dose anyone know?When will the performance begin?(合并为一个句子）

1.Dose anyone know?When will the performance begin?(合并为一个句子） 2.I prefer to trave
1.Dose anyone know?When will the performance begin?(合并为一个句子）
2.I prefer to trave by train.Travelling by train is cheaper than traveling by air.（合并为一个句子）
3.Who invented it?（变为被动语态）

1.Does anyone know when the performance will begin?
2.I prefer to travel by train because travelling by train is cheaper than traveling by air.
3.By whom was it invented

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