Past perfect

1. It was obvious that he [blank_start]had[blank_end] [blank_start]made[blank_end] a mistake. 2. She said she [blank_start]hadn’t[blank_end] [blank_start]slept[blank_end] all night. (negative) 3. They [blank_start]had[blank_end] [blank_start]lived[blank_end] in California for six years before they realized their mistake 4. Jim [blank_start]had[blank_end] never [blank_start]caught[blank_end] such a large fish before 5. Alice wanted everyone to try the dessert she [blank_start]had[blank_end] [blank_start]prepared[blank_end] for the party. 6. It seemed as though I [blank_start]had[blank_end] [blank_start]met[blank_end] her somewhere else. 7. My teacher admitted that he [blank_start]had[blank_end] [blank_start]forgotten[blank_end] about the assignment. 8. They weren’t certain if the test [blank_start]had[blank_end] [blank_start]been[blank_end] successful. 9. We would have bought the furniture if it [blank_start]had[blank_end] [blank_start]cost[blank_end] a little less. 10. Many children died because they [blank_start]hadn’t[blank_end] [blank_start]been[blank_end] [blank_start]vaccinated[blank_end]. (negative)