don't worry about ()mistakes.They're ()natural part of learning.应该填什么冠词

问题描述:

don't worry about ()mistakes.They're ()natural part of learning.应该填什么冠词
求理由,还有学习的一部分不是指代了前文提到的mistakes吗?为什么不是特指?did you think of the exhibition?Oh,it was ()success括号里填quite a 还是填great?

1 第一空不填 第二空填a
理由 本句中,错误不分种类,是泛指,又是复数,所以不填;
a part of是固定短语
2 success前面填a
理由 当success之类的抽象名词具体为某人某物时是可数的
浅见,供参考.