41. once in a blue moon 极难得的，很少见的

David dances with Jane only once in a blue moon.大卫很少和简跳舞。

42. all the rage 风行一时

Hip-hop is all the rage nowadays.现在hip-hop舞蹈风行一时。

43. it is high time...did 实在是该做…的时候了

It's high time we went.

现在该是我们去的时候了。

44. be named after 以…命名

This place is named after him.这个地方以他的名字命名。

45. rain cats and dogs 下暴雨

In June, it usually rains cats and dogs in the South part of China.五月份的时候，中国南方总下暴雨。

46. rain or shine 无论晴雨，风雨无阻

Rain or shine, I used to walk this path each day to see Greta无论晴雨，我每天都会走过这条小路去看格丽塔。

47. make someone's mouth water 馋得流口水

The delicacies on the table makes him mouth water.桌上的美味佳肴馋得他直流口水。

48. on cloud nine 非常高兴，欣喜若狂

When she finally got the contract, she was on cloud nine.当她较终签订合同以后，她简直就是欣喜若狂。

49. cast a cloud over 使蒙上一层阴影

It was the country’s worst suicide attack that cast a cloud over her hopes of return.

这个国家较严重的一次自杀式进攻使她回去的希望蒙上了一层阴影。

50. have one's head in the clouds 心不在焉

He seems to have his head in the clouds.他看起来心不在焉。

51. down in the dumps 十分沮丧

I felt down in the dumps.我感到万分沮丧。

52. go for a song 贱价抛出

There are some soft drinks going for a song in the supermarket.

详情可咨询新航道石家庄学校。