There is no reason __ should feel the need to have your mobile phone during class.
问题描述：
There is no reason __ should feel the need to have your mobile phone during class.
为什么填why而不是that
句子应该是
There is no reason __ you should feel the need to have your mobile phone during class.
答
the reason why 是固定句型,如 the reason why I argue with you is that.我之所以和你争吵的原因是.