定冠詞the用法？

例句

The problem is not primarily a financial one.

這個問題基本上不是財政問題。

Today we learnt how to use the new software.

今天我們學習了怎樣使用這個新軟件。

In our company, quality is high on the agenda.

我們公司高度重視質量。

I could come next week, or the week after.

我可能下週來，或者再下一週。