有五种不同水平的读本，从初级到中高级。

There are ___readers at five different levels, from beginner to upper intermediate.

这本读本包含为语言学习者准备的短篇故事。

This ___reader contains short stories for language learners.

她用一本读本来练习法语阅读。

She uses a ___reader to practice reading in French.