Explanations:Correlative conjunctions are pairs of conjunctions that work together to connect words, phrases, or clauses. They are used to express relationships between elements in a sentence, such as contrast, addition, or choice. Common pairs of correlative conjunctions include "either...or," "neither...nor," "both...and," and "whether...or."
In the given sentence, "We do not know _____ it's you _____ me who will have to do it," the correct pair of correlative conjunctions is "whether...or." This pair is used to express a choice or uncertainty between two options. The sentence is conveying that there is uncertainty about who will have to do the task, either the person referred to as "you" or the person referred to as "me."
Let's break down the usage of "whether...or" in this context:
1. **Expressing Uncertainty**: "Whether...or" is used when there is uncertainty or a choice between two options. In this sentence, the speaker is uncertain about who will have to do the task, so "whether...or" is the appropriate pair to use.
2. **Structure**: The structure of the sentence with "whether...or" is "We do not know whether it's you or me who will have to do it." This structure clearly indicates that the speaker is uncertain about the identity of the person who will have to do the task.
Other pairs of correlative conjunctions, such as "either...or," "both...and," and "not only...but also," do not fit the context of the sentence:
1. **"Either...or"**: This pair is used to present mutually exclusive options, meaning that only one of the options can be true. For example, "You can either go to the store or stay at home." This does not fit the context of the given sentence, as it does not express uncertainty but rather a choice where only one option can be true.
2. **"Both...and"**: This pair is used to combine two things, indicating that both options are true. For example, "Both you and I will have to do it." This does not fit the context of the given sentence, as it does not express uncertainty but rather a combination of two things.
3. **"Not only...but also"**: This pair is used to emphasize the addition of one thing to another. For example, "Not only you but also I will have to do it." This does not fit the context of the given sentence, as it does not express uncertainty but rather emphasizes the addition of one person to another.
Therefore, the correct pair of correlative conjunctions to use in the given sentence is "whether...or," as it correctly expresses the uncertainty about who will have to do the task.