Read these sentences and fill in the gaps with the correct verb form in the past perfect.
Example 0. John his rabbits by \(9\) o’clock yesterday. (feed)
Answer 0. had fed.
1. Before Ken ran to Kerry's house, he him. (phone)
2. Before the students started to write, the teacher their mobile phones. (collect)
3. Before Emma laid the table, she a talk with her mother. (have)