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Evaluating the pros and cons of Randall's Lab, I am thus inclined to say that Randall's Lab is a great resource for English learning .It provides a free educational listening web site to thousands of visitors around the world. User can download all that in the website.

This website possesses a main trait that it focuses mainly on listening comprehension. In my opinion, it should be designed for non-native English speaker to practice their listening comprehension. In other words, it aims to provide English learner with opportunities for practicing their listening comprehension.

Its content is divided into four levels containing easy, medium, difficult,
and very difficult. Each level is separated into different subjects. Therefore, user can choose specific subject they would like to listen.

As a matter of fact, it provides user with questions, quiz script, and explanation of answers. After taking a test, user would know how much content they understood immediately.