many kinds of后用单数还是复数

可数名词用复数，不可数名词用单数，例如：

1、Many kinds of insect find their mates by scent.许多昆虫通过气味找到交配对象。

2、Many kinds of animals have vanished from the earth.许多动物已从地球上消失了。

3、Many kinds of evidence are of no use in court.许多证据在法庭上并没有用。