In each class, forty pupils are divided into four groups of ten.

每个班四十名学生被分成四组，每组十人。

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Four of the five Nordic countries are in the top ten.

五个北欧国家中，有四个进入前十名。

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Fifteen minutes were left in class, then ten, eight, five, four, two.

还剩15分钟，10分钟、8、5、4、两分钟。

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Fifteen minutes were left in class, then ten, eight, five, four, two.

还剩15分钟，10分钟、8、5、4、两分钟。

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