Answer:
B. The police inspector, as well as his assistant, are at the crime scene.
Explanation:
It cannot be answer choice A because the present-tense verb "go" is used incorrectly and should be the past-tense verb "went."
It cannot be answer choice C because "along" is a preposition, and to determine the correct subject-verb agreement, you can never use prepositional phrases as the subject. Since the subject is "speaker," and it is singular, it needs a singular verb, and "have" is a plural verb.
It cannot be answer choice D because the compound subject of the "computer plus his wallet" is plural, meaning that it needs a plural verb, and "was" is a singular verb.
Therefore, the only possible correct answer choice would be option B. The compound subject of "The police inspector as well as his assistant" is plural and "as" is not a preposition, meaning that it needs a plural verb, and "are" is a plural verb.
I hope this helps!
