问题
选择题
I iust don't understand that leads to so many teenagers becoming addicted to playing computer games·
A．why it does B．what it does C．what it is D·why it is。
答案
C
这里宾语从句是强调句型的特殊疑问句形式，强调主语what, 原强调句为What is ti that leads to …,做understand 的宾语从句时，需要使用陈述语序，故选C