He was not an actor, who often appeared on stage, _____ a writer, writing stories.
| A．but | B．and |
| C．then | D．so |
Without more wood ____ the fire, it would soon go out.
| A．added to | B．adding to | C．added up | D．adding up |
The workers are talking about the doctors and the offices ____ they visited yesterday.
| A．which | B．who | C．that | D．where |
Mr. Smith was ____ to break his habit of smoking after the medical examination last month.
| A．devoted | B．concerned | C．used | D．determined |
I prefer to eat in that restaurant, because the ____ of service there has improved a lot.
| A．quality | B．schedule | C．principle | D．guidance |
Of all _____ reasons for his decision to study abroad, his father’s advice was ____ most important one.
| A．the; a | B．不填; a | C．不填; the | D．the; the |