variety的形容詞形式是什么

　　例句：

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

　　我們曾經碰到各種各樣的困難，但我們一個個克服了。

　　2、Schools use various methods of testing.

　　學校采用各種各樣的測試方法。

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

　　你能給我詳述可以選擇的各種投資方法嗎？

　　4、The methods are many and various.

　　方法很多且各不相同。