1.dark horse　黑马

Nobody considered that John would win the game.He was a dark horse in the final.

我们都没想到John会赢得比赛，他是匹黑马。

2.dear John letter　绝交信

Jack received a dear John letter from his girlfriend because he had broken her heart.

Jack收到了他女朋友的分手信，因为他伤了她的心

3.do somone good　对某人有好处

Having some moring exercises does you good. Do you get me?　做些晨练对你很有好处，你明白我的意思吗？

4.doesn't count 这次不算

It doesn't count this time,try again. 这次不算，再来一次~

5.doesn't make sense　不懂；没有任何意义

The sentence you made doesn't make any sense to me. 你说的话我不懂。

6.down and out 穷困潦倒

Being down and out,he couldn't support his family. 他穷困潦倒到不能支撑家庭的生计。

7.drive at　用意，意欲

What's he driving at?他用意何在？

8.drop in 顺便拜访

I dropped him in on my way to the hospital. 我去医院的路上顺便看了下他。

9.drop me a line　写信给我

On arriving the University,please drop me a line. 你一到学校就给我写信吧。