what is the use of the pronoun...

Q1. Is the town's oldest couple (they) or the Halberts?
i think it's predicate nominative

Q2. the coach gave (me) another chance to try out.
it's subject of an infinitive

Q3. late for a meeting, (he) quickly hailed a taxi.
it's subject

Q4. Jacques serves braised veal that (we) gourmets appreciate.
i think it's subject

They're all right except for Q. 2.

is it an indirect object?

Right. "Me" is an indirect object of the verb, "gave."

thanks .. :D

Q1. In the sentence "Is the town's oldest couple (they) or the Halberts?", the pronoun "they" is being used as a predicate nominative. A predicate nominative is a noun or a pronoun that follows a linking verb and renames or identifies the subject of the sentence. In this case, "they" is renaming or identifying the subject of the sentence.

To come to this conclusion, you can break down the sentence and ask yourself the question: "What renames or identifies the subject 'the town's oldest couple'?" The options given are "they" or "the Halberts." By considering the meaning of the sentence, you can see that "they" is the correct choice because it refers to the couple being discussed.

Q2. In the sentence "The coach gave (me) another chance to try out," the pronoun "me" is functioning as the subject of an infinitive. An infinitive is the base form of a verb usually preceded by the word "to." In this case, the infinitive is "to try out."

To identify the subject of an infinitive, ask yourself the question: "Who is doing the action of the infinitive?" In this case, the coach is giving another chance, so "me" is the correct choice as the subject of the infinitive "to try out."

Q3. In the sentence "Late for a meeting, (he) quickly hailed a taxi," the pronoun "he" is the subject. The subject is the noun or pronoun that performs the action of the verb in a sentence.

To identify the subject, ask yourself the question: "Who is performing the action of hailing a taxi?" In this case, it is "he" who is performing the action, so "he" is the correct choice.

Q4. In the sentence "Jacques serves braised veal that (we) gourmets appreciate," the pronoun "we" is the subject. The subject is the noun or pronoun that performs the action of the verb in a sentence.

To identify the subject, ask yourself the question: "Who are the gourmets that appreciate the braised veal?" In this case, it is "we" who appreciate the veal, so "we" is the correct choice.