Sometimes the pupils work in pairs.

有时学生两人一组学习。

Let's work in pairs.

让我们两人一组。

You should work in pairs to ask the way.

你们应该两人一组去问路。

You shall work in pairs or groups to show the preview results.

你们要分组展示预习成果。

Now work in pairs to finish 2.

学生两人一组合作完成2。