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.
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.
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.
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?
45. take a chair, take the chair
take a chair相当于sit down坐下，take the chair开始开会
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
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
48. in office, in the office
in office在职的，in the office在办公室里 He is in office, not out of office.
49. in bed, on the bed
in bed卧在床上，on the bed在床上 The book is on the bed. He is ill in bed.
50. in charge of, in the charge of
in charge of管理，负责照料， in the charge of由……照料 He is in charge of the matter. The matter is in the charge of her.