Grammar and usage
Non-restrictive attributive clauses非限制性定语从句
Try to find the attributive clauses in Para 6 on page of Reading (page 35).
attributive clauses:She spent all her life helping poor people in India, most of whom were dying.2. …she wore the same old clothes as usual, and carried all her possessions in a little bag like this, which I bought in a market.
Practice
引导定语从句关系词
指代人    指代事物  所属关系  指地点    指时间    指原因   
who/whom/thatwhich/thatwhosewherewhenwhy
关系副词
关系代词