(1) an eager beaver：做事特别卖力的人
every year during the long holidays in june and december, many people go abroad for a tour except jason, an eager beaver, who will at most take a few days off in singapore.

(2) a busy bee：忙碌的人
there isn't much to do today, but nancy has been rushing here and there like a busy bee.

(3) have a bee in one's bonnet about... : 对……苦思不已
as a low-income bread-earner, ali has a bee in his bonnet about increasing his monthly income.

(4) make a bee-line for ...：径直朝向……
after class, student rushed out of classroom, making a bee-line for the nearest canteen.

(5) an early bird：早起的人
morning walk at six? no problem ! i'm an early bird, you know.

(6) a home bird：爱在家里的人
jason's youngest son doesn't care for social life; he is a home bird through and through.

(7) a bird's-eye, view of...：鸟瞰；概观
(i) from the plane, we can have a bird's eye view of the singapore buildlngs.
(ii) jason's new book can give the reader a bird's eye view of elements of good english.

(8) a cat nap：瞌睡
between lunch and the 2 p.m. class, there is at least half an hour for a cat nap.

(9) lead a cat-and-dog life：过着吵吵闹闹的日子
poor couples often lead a cat-and-dog life because of financial problems. don't you think so?

(10) let the cat out of the bag：泄露秘密
david was planning a surprise birthday party for irene, but his new secretary let the cat out of the bag in a casual talk.

(11) there is not enough room to swing a cat：没有活动的余地
how can you live and do your design work in such a small room? there isn't enough room to swing a cat, is there?

(12) rain cats and dogs：倾盆大雨
we can't go out yet. it is raining cats and dogs at the moment.

(13) no chicken：不再是小孩
don't treat lily like a kid! she is no chicken now.

(14) a cock-and-bull story：无稽之谈
whenever tom was late for work, he would tell a cock-and-bull story as an excuse.

(15) wait till the cows come home: 无限期的等待
don't lend him money. if you want him to pay back, you have to wait till the cows come home.

(16) crocodile tears：鳄鱼泪