The correct answers are Detective Miller hasn't contaminated the evidence, but Detective Smith certainly has and Miller wanted to interrogate the parrot, and Smith wanted to.

...but Detective Smith certainly has.

This is a correct use of Verb Phrase (VP) ellipsis. The phrase "contaminated the evidence" is understood after the auxiliary "has."

...and Smith wanted to.

This is another correct form of VP ellipsis, where the infinitive marker "to" is stranded, and the verb phrase "interrogate the parrot" is perfectly understood from the first clause.

Incorrect options:

"...and Smith will tomorrow" is incorrect. The antecedent verb is the passive "was fired." The modal "will" requires the bare infinitive "be" to complete the passive structure ("...and Smith will be tomorrow").

"...and Smith has too" is incorrect. The antecedent is the present participle "dusting," but the auxiliary "has" requires a past participle ("dusted"). Because "dusted" does not appear in the first clause, this ellipsis fails.