as easy as falling of a log /as easy as snapping your fingers /as easy as ABC
容易得很
To me,a good story teller,it would be as easy as falling of a log.
对我来说，讲个故事还不是随手拈来。
as busy as a bee
非常忙
Mum is always as busy as a bee in the moring.
妈妈每天早上都忙得不可开交。
at one's fingertips
了如指掌
How to get at that little island is at his fingertips.
他知道怎么去那个小岛。
at one's wit's end
智穷
Don't ask him.It is also at his wit's end.
不要问他了，他也不知道。
big shot
大人物，大亨
black sheep
败家子，害群之马