Ⅰ. 单词拼写
1. The meeting was ______ (发起) by 16 countries.
2. The ______ (文凭) is very important for him to get the job.
3. They ______ (交换) their views heart to heart.
4. Upon reaching an ______ (适当的) age, children are encouraged, but not forced, to “leave the nest”.
