The question tests your knowledge of idiomatic expressions in English. In this instance, the idiom provided is "call it a day". Let's examine the correct meaning and why it fits the idiom:
- The idiom "call it a day" is commonly used in English to signify stopping work or concluding an activity, generally after a significant amount of effort or time has been put in, or when one has accomplished enough work for that session.
- The given options are:
- stop working on something
- start working on something
- take rest on the day
- go out on the day
- Let's evaluate each option:
- stop working on something: This aligns perfectly with the idiomatic expression, as "call it a day" means to end the work or task at hand for that day.
- start working on something: This is the opposite meaning of the idiom. "Call it a day" implies ending, not beginning an activity.
- take rest on the day: While taking rest could be a consequence of stopping work, the idiom specifically refers to the cessation of work rather than taking rest.
- go out on the day: This doesn't correlate with the idiomatic expression, which is more about ending work activities rather than going out.
- Thus, the correct choice here is: stop working on something.
In conclusion, "call it a day" means to decide that you have finished doing something and will not continue until another time. Therefore, "stop working on something" is the correct interpretation of the idiom in this context.