In the sentence "He did not like .... leaving the class early", we are looking for a pronoun that fits grammatically and contextually.

The pronoun is the object of the verb "like" and refers to the people who left the class early.

Let's consider each option:

•  A. we: "We" is a subject pronoun, used when the pronoun is the subject of the sentence. It doesn't fit here because we need an object pronoun.
• B. us: "Us" is an object pronoun, used when the pronoun is the object of the sentence. This is the correct choice. The sentence becomes "He did not like us leaving the class early", which means that he didn't like the fact that we left the class early.
• C. our: "Our" is a possessive adjective, used to show ownership or association. It doesn't fit in this context.
• D. ourselves: "Ourselves" is a reflexive pronoun, used when the subject and the object of the sentence refer to the same person or group. It doesn't fit in this context.
• E. our selves: This is not a standard English phrase and doesn't fit in this context.

So, the most suitable option is B. us.

The completed sentence is: "He did not like us leaving the class early". .