Bạn nào làm giúp mình bài này vs ạ

rcise 10: Complete the sentences with a relative pronoun. 1. The man paid for the meal was a friend of Tom's. 2. The meeting we had to attend went on for three hours. 3. My office, . is on the second floor of the building, is very small. ............. 4. Jane works for a company makes ...