b. That was the time __w_h_e_n_ he arrived. Do you still remember the time __(_t_h_a_t_/_w_h_ic_h_)__ we spent together?
c. This is the reason __w_h_y_/_f_o_r_w_h_i_c_h he went. The reason _(_t_h_a_t_/_w_h_i_c_h_) he gave us was quite reasonable.
请用关系代词或关系副词替换下 列假设定语从句当中的成分
1. The boy is playing ping pong.
Who/that
which/that
2. I received the email.
Who/that
which/that
3. People talk much but do little.
思考：whose替换？定语，意思：“......的”
定语从句怎样选填关系词呢？
1.找到主句和先行词，确定是否是定语从句；
2.把先行词或含有先行词的短语还原到定语从句中去；
3.根据先行词或其短语在定语从句中所充当的成分进行替换；
规则如下：
主语：指人who,that ；
指物that,which
宾语：指人who,that,whom;
关系代词（that, which, who, whom, whose)和 关系副词（when, where, why)。关系代词在从 句中充当主语、宾语、定语等成分，关系副词
在句中作状语。
怎样选填关系词呢？
I have some friends.
Some friends like sports.
