41. in a word, in words

　　in a word 总之，一句话，例：In a word, you are right.

　　in words 口头上。

　　42. in place of, in the place of

　　in place of 代替;

　　in the place of 在地方，例：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，例：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，例：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。