问题
选择题
The letter____Tommy received from his company yesterday is very important.
A．who
B．where
C．what
D．that
答案
答案：D
本题考查先行词the letter的定语从句的引导词，由于先行词是物不可用who（who指人）,也不可用关系副词where（where指地点）以及代词what（what不是关系代词），故选D,that作定语从句的宾语，指代the letter.