The adverb phrase that describes "will see" is "after school". This is an adverb phrase that describes the time: when does the action of the verb occur.
An adverb phrase is any phrase that acts as an adverb - that is, it describes or modifies a verb (most often), another adverb, or an adjective.
In this case, we can easily see that this is an adverb phrase, by replacing it with a common adverb, for example - later.
The correct answer is A. have been
This is a linking verb that provides the aspect of the main verb that is careful. Should is a modal verb.
<span>b. play music with Peter and the musicians </span>
