1 . Diamond necklaces and rings ____________________ on a background of a black velvet. (根据句意填空)

2 . Directions: Complete the following sentences, using appositive clauses.
1. News came from the school office _________________________.（王林被北京大学录取了）
2. —It's thirty years since we last met.
—But I still remember the story, believe it or not, _________________________.（我们在雨夜迷了路）
3. Many experts stick to the view _________________________.（教师发展是教育质量的关键）
4. The question came up at the meeting _________________________.（我们是否有足够的钱搞研究）
5. Johnson broke his promise _________________________.（他会给我们每人一个小礼物）