13.out of one’s depth
力所不能及
He felt out of his depth on a diploma course.

14.get one’s just deserts
活该

15.die like a dog
凄苦地死去（古）

16.every dog has its day
风水轮流转来源：考试大

17.It’s a dog’s life
（抱怨生活或工作不如意）来源：考试大

18.in the doghouse
四面楚歌
Insurance companies are already in the doghouse over poor advice on pensions which has left hundreds of thousands of people worse off.

19.do the donkey work
做乏味的工作来源：考试大

20.do something like a dream
做的很出色
The first stages of installation worked like a dream.

21.all dressed up with nowhere to go
准备充分，但没机会去做
If funding dries up ,the opera houses will be all dressed up ,but with nowhere to go .

22.do something at the drop of a hat
卤莽行事来源：考试大

23.a drop in the ocean/bucket
微不足道，沧海一粟来源：考试大
The size of the grants have been attacked by groups as merely a drop in the ocean.

24.be all ears
洗耳恭听来源：考试大
Now you can say ,I am all ears.

25.down to earth
现实，实际
He is blunt,outspoken,practical and down to earth.