Don't try to get off the bus ____ it has stopped.
| A．while | B．as | C．since | D．before |
Anyway, I can’t cheat him—it’s against all my ____.
| A．emotions | B．principles | C． regulations | D．opinions |
Teachers have to constantly update their knowledge in order to maintain their professional _____.
| A．consequence | B．independence | C．competence | D．intelligence |
We’d better discuss everything _______ before we work out the plan.
| A．in detail | B．in general | C．on purpose | D．on time |
There’s a _____ in our office that when it’s somebody’s birthday, they bring in a cake for us all to share.
| A．tradition | B．balance | C．concern | D．relationship |
The Harry Potter books are quite popular; they are in great ______ in this city.
| A．quantity | B．progress | C．production | D．demand |