The old man depends on his son.

那老人靠他儿子养活。

His answer depends on his point of view.

他的答覆全视其观点而定。

Pupils depend on their teachers for instruction.

学生仰赖老师的教导。

You may depend upon the accuracy of the report.

你可信赖此报告的准确性。

That depends.

那要看情况。