if we just receive answers without thinking about it,we'll never learn well.这句话中有什么错误

前面是answers，所以后面的it要改为复数them
if we just receive answers without thinking about them,we'll never learn well.
learn可以作不可数名词，使用没有问题

learn
是个及物动词
后面应该接宾语 如：it, this, that……
所以是learn it well

learn 是及物动词

后面加一个宾语 it 就OK！

it 放到 learn 后面 句子读起来比较舒服吧~