矿工们在地下深处辛苦劳作，开采煤炭。

The miners ___toil deep underground to extract coal.

农民们日复一日地在田间辛勤劳作。

The farmers endured years of ___toil in the fields day after day.

工人们费力地在泥泞的田地里缓慢前进。

The workers ___toiled through the muddy field, moving slowly with great effort.