When you come into our school, you must speak Putonghua.
一进学校，你就要讲普通话。

We have one weekly meeting on Monday afternoon.
周一下午我们有一节班会。

This is our first Maths class of this term.
这是我们本学期第一节数学课。

The Chinese lessons are very important。
语文课对于我们来说相当重要。

Don’t make any noise in class,or you may trouble the others.
课上不要喧哗，那会影响别人。

Listen to me carefully,let me tell you something about the writer.
请认真听我为大家介绍一些作者的情况。

First,let me read the text aloud.
首先让我为大家朗读本文。

If you study English, it’s very easy, but if you don’t， it’s very hard.
对于英语，你学它就不难，你不学它就显得挺难。