I iust don't understand that leads to so many teenagers being addicted to playing puter games·
A.why it does B.what it does C.what it is D·why it is。
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解析: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