So graded readers are great for this if you have access to them, or even just something that's easy.
因此，如果您可以访问分级阅读器，甚至只是简单的东西，分级阅读器就非常有用。
英语百科
Graded reader
Graded readers are "easy reading" books used to support the Extensive reading approach to teaching English as a second or foreign language, and other languages. While many graded readers are written for native speaker children, more often they are targeted at young adults and above, since children's books are already widely available and deal with topics not relevant to more mature language learners.