阅读短文,根据意思,填出所缺的单词.首字母已给出.I am a helper in our schllo library.I come b______school starts and stay after most other students have gone home.

问题描述:

阅读短文,根据意思,填出所缺的单词.首字母已给出.
I am a helper in our schllo library.I come b______school starts and stay after most other students have gone home.

before