The notes for glossary (词汇) are very exact and particular, which could help readers to break the language so directly and effectively.
Having checked the doors were closed, and ________ all the lights were off, the boy opened the door to his bedroom.
It is none of your business ________ other people think about you.Believe yourself.
—Where's that report? —I brought it to you ________you were in Mr.Black's office yesterday.
You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future.
Could I speak to ________ is in charge of International Sales,please?