On the third floor there are two rooms, _____ is used as a meeting-room.
The secretary is very careful and never ___ any little points in her daily work.
Jack offered us a big meal when he was leaving the office, but our work ____, we refused it.
In the library new books have to be ___ before they are put on shelves for reader’s use.
Your suggestion sounds very good, but there are many ___ difficulties we have to face.
Having been ___ volunteer in a day-care centre for weeks, Susan feels much sympathy for ___ disabled.