工人们正在用挖掘机挖开路面铺设新管道。

The workers are ___excavating the road to lay new pipes.

考古学家在田野中挖掘出了一座古代房屋的遗址。

The archaeologists ___excavated the ruins of an ancient house in the field.

考古学家正在挖掘一座古代墓穴。

The archaeologists are ___excavating an ancient tomb.