1.“Is ________ you want to say？” asked the teacher.
A．this B．that C．all that D．that all
答案 D [D项的that是指示代词，充当主语，all是句子的表语，其后是一个省略了that的定语从句。]
2．September 1st is the day students register for their universities，________ mixed with the emotion of hope，fear and anxiety.
A．a day B．which C．what D．that
答案 A [a day mixed...是独立主格结构，如果选B，其后须加is。]
