1. Note the usage of the idioms taught in this lesson. Some can be directly used as adjectives:
a. 大家忙得鸡飞狗跳.
b. 做事情总是一马当先的人，将来成功的机会比较高.
c. 这个工作对哥哥来说真是如鱼得水，因为刚好是他最拿手的.

While others are used as comparisons.
d. 比如说，这一段文章的主题只有一个，但是文章前后的内容却好像牛头不对马嘴，完全没有关系.
e. 跟他那种不讲道理的人说话，就像对牛弹琴一样，浪费我的时间.

2. In English we talk about being like a fish “out” of water, whereas in Chinese they emphasize the opposite aspect of a fish being “in” water in 如鱼得水.