Question

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。

Answer 1

　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