variety的形容词形式是什么

例句：

1、We have been up against various difficulties, but we surmounted them one by one .

我们曾经碰到各种各样的困难，但我们一个个克服了。

2、Schools use various methods of testing.

学校采用各种各样的测试方法。

3、Can you talk me through the various investment options?

你能给我详述可以选择的各种投资方法吗？

4、The methods are many and various.

方法很多且各不相同。