非限制性定语从句（which/who/whose） — 英语词汇题
题目
根据句意和首字母补全非限制性定语从句中的关系词。1. Mina, w___ studies several languages, is my friend. 2. The script, w___ history is very long, is still used today. 3. This language, w___ is spoken in many countries, has several forms.