47. the doctor and teacher, the doctor and the teacher

　the doctor and teacher指一个人，既是医生又是老师，the doctor and the teacher两个人，一个医生和一个老师 the doctor and teacher is

46. go to sea, by sea, by the sea

　go to sea当海员，出航，by sea乘船，由海路， by the sea在海边 go by sea

45. take a chair, take the chair

　take a chair相当于sit down坐下，take the chair开始开会

44. a girl, one girl

　a girl可泛指所有女孩, one girl一个女孩 Can one girl carry such a big box?

43. in secret, in the secret

　in secret秘密地，暗自地，偷偷地，一般用作状语；in the secret知道内情，知道秘密，一般用作表语 My mother was in the secret from the beginning.

42. in place of, in the place of

　in place of代替，in the place of在…地方 A new building is built in the place of the old one.

41. in a word, in words

　in a word总之，一句话， in words口头上 In a word, you are right.

40. take air, take the air

　take air传播，走漏，take the air到户外去，散步 We take the air every day.

39. take advice, take the(one's) advice

　take advice征求意见，take the advice接受忠告 He refused to take the advice and failed again.

38. more than a year, more than one year

　more than a year一年多，more than one year超过一年(两年或三年等)