Answer:
1. The children could not wait to get back to Namche, where their parents lived.
2. At last the contractors managed to repair the bridge, which had been destroyed by tsunami.
3. The shopkeeper, who was facing the other side, turned round suddenly.
4. I eventually found the purse, which I had bought yesterday, in my school bag.
5. We were all grateful to our principle, who had helped us in cleaning the school garden.
Explanation:
Relative pronouns were used to begin the relative clauses in the sentences above. Each of these relative pronouns have their own usage. Where is a relative pronoun that serves as a replacement for places. In the first sentence, where replaced Namche, the place where the children's parents lived. Which is a relative pronoun that serves as a replacement for objects and things. The bridge is the object or thing that was replaced by which in the third sentence.
Who is a relative pronoun that serves as a replacement for nouns and pronouns that form the subjects in sentences. For example, in the third sentence, who serves as a replacement for the noun, shopkeeper.
