阅读下面短文，然后从所给的四个选项中选出一个最佳答案。

    Learn English speaking FREE with TalkEnglish.com. Our goal is to help you learn English speaking so you can speak English fluently. Improve your spoken English free!

    Steps to learn English.

    To become a fluent English speaker, you must study and master reading, listening, and speaking. At  TalkEnglish.com, the lessons are structured(打造) to give you practice in all three areas at the same time.

    Reading            Step 1: Identify

    Speaking   English Fluency        Step 2: Understand

    Listening            Step 3: Integrate

    A complete and effective solution to Learn English speaking.

    TalkEnglish.com developed the "Click, Listen, and Repeat" functionality(功能). In most of the lessons, you read the sentence, click on the sentence to listen to the sentence, and then you can practice speaking by repeating after the audio file(音频文件) provided by a native English speaker. This method improves your reading, speaking, and listening all at the same time and makes learning English easy. You will improve your English speaking using this method.

选词填空。

的平方根是____．

材料二：近年来，广东中小企业贷款在总贷款的余额中只占20％左右，扩大再生产所需资金严重不足。中小企业老板具有大专及以上学历的人只有10％，初、高中水平的人居多。