问题描述：
She bit down so hard it hurt.这句怎么理解?句子成分各是什么?
原文：Maria sighed and gritted her teeth.She
bit down so hard it hurt.Then she entered
the classroom.The first day of school was
not easy for someone who was shy.
原文：Maria sighed and gritted her teeth.She
bit down so hard it hurt.Then she entered
the classroom.The first day of school was
not easy for someone who was shy.
问题解答：
我来补答展开全文阅读