Answer:
The correct answers are: 1)c, 2)b, 3)c, 4)a, 5)b, 6)a, 7)b, 8)c
Explanation:
1)c: Julia and her friend are the group of words that is the subject of the sentence because they are both <em>"in charge"</em> of the action (will meet us at the theater). "At the theater" is an <u>adverb of place</u> (it tells where the action will take place).
2)b: To the plan is the group of words that is a prepositional phrase because it is the one that starts with a preposition ("to")
3)c: In a locked box is the group of words that is a prepositional phrase (<em>serving as an adverb of place) </em>because it is the only phrase that starts with a preposition ("in")
4)a: There were delegates is the group of words that is NOT a prepositional phrase because there is no preposition here. The preposition in b) is "at" and in c) is "from"
5)b: Is chirping is the group of words that is the complete verb because the <em>main verb</em> "chirping" is accompanied by the auxiliary "is".
6)a: Joined is the complete verb in the sentence although there are no auxiliaries. "without saying a word" is an <em>adverb of manner (tells us how the action is performed)</em>
7)b: Might have forgotten is the complete verb in this sentence. "Forgotten" is the main verb, "Might" is a <em>modal verb</em> (of <em>possibility</em>) and "have" an auxiliary".
8)c: Could answer is the group of words that is the complete verb. "Answer" is the main verb and could is a <em>modal verb (of ability</em>)