a). Are you sure that you can go to the fair this weekend?
Explanation:
Verbals are characterized as the verbs that do not play the role of verbs in the sentence. These are the present or past participle forms of the verb which function as adverb, noun, or adjective in the sentence. The first sentencedoes not include a verbal as there is no verb that is functioning as a noun or to modify the verb or noun. The second sentence employs 'amazing' is acting as the adjective. Thus, <u>option a</u> is the correct answer.
