农夫们整日在田里辛勤劳作。
The farmers ___toil all day long in the fields.
工人们在烈日下辛苦劳作。
The workers ___toiled under the scorching sun while working.
建筑工人们在烈日下辛苦工作了一整天。
The construction workers were ___toiling under the scorching sun all day.
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