They had to work ______ so that they could finish work on time.
Understand the Problem
The question is asking for the correct word to fill in the blank to complete the sentence logically. It involves understanding the context of work hours.
Answer
so that
The final answer is 'so that'.
Answer for screen readers
The final answer is 'so that'.
More Information
'So that' is used to indicate purpose or result. In this context, it means they worked with the intention of finishing on time.
Tips
A common mistake is using 'because', which indicates a reason, not purpose.