The correct Active/Passive form of the given sentence is:

☀ This work is to be finished by me.

Explanation for other options:

☀ This work is to be finishing by me. This option uses "finishing," which is a present participle, and is not appropriate in this context. The correct form should use "finished" as the past participle in the passive construction: "This work is to be finished by me."

☀ This work is to be finishing by my. This option uses "my," which is a possessive pronoun and is not appropriate in this context. The correct form should use "me" as the object of the preposition: "This work is to be finished by me."

☀ This work was to be finished by me. This option changes the verb tense to past tense ("was to be finished"), which suggests an action in the past. The original sentence is in the present tense, so the correct form should be "This work is to be finished by me."