Explanation

In the sentence "Well, I don't think I will be home before 6 pm", the word "well" is an interjection.

In this sentence, "well" is used to express a sense of hesitation, resignation, or softening the tone of the statement.

Explanation

The correct sentence is: "Oh, I forgot my keys." 

"Oh" is a common interjection used to express surprise, which fits the context of suddenly remembering the forgotten keys.

It is properly followed by a comma, as interjections are typically separated from the rest of the sentence.

Explanation

An interjection is a word or expression that occurs as an utterance on its own and expresses a spontaneous feeling or reaction.

It is a diverse category, encompassing many different parts of speech, such as exclamations, curses, greetings, response particles, hesitation markers, and other words. 

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RY 15-01-2023

Explanation

A(n) interjection is a word that expresses a strong emotion such as joy, sorrow, excitement, surprise, etc.

It often stands alone or at the beginning of a sentence, adding emotion or emphasis to the expression.

Explanation