You'd better preview the text before class.
你最好在课前预习好课文。
First of all, let's preview the text in class for some minutes.
首先，我们就这篇课文课堂预习一会儿。
You may edit the text in the Preview Voice section.
您可以在预听声音部分编辑文字。
Please preview the text before you come to class next time.
下次来上课前请预习课文。
You should preview the text before the class.
上课之前你要预习课文。
You should preview the text before the class.
上课之前你要预习课文。
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