火车正在隧道中驶出。

The train is coming out of the ___tunnel.

火车穿过隧道时发出巨大的轰鸣声。

The train made a loud noise as it passed through the ___tunnel.

工人们正在挖掘隧道以建造一条新的地下通道。

The workers are ___tunneling to create a new underground passage.

我使用VPN隧道来安全地连接到公司网络。

I use a VPN ___tunnel to securely connect to the company network.