They think the room is________, but as a matter of fact it is already occupied. 

Air is________and of no smell but we can feel its motion when there is a wind. 

        , the young teacher is the sort of woman to spread sunshine to her students and colleagues thought her smile.

—I wonder whom you are waiting for.
—The policeman       the traffic accident.

26. The doctors ______his health.

---- I did well in the English exam last week.
---- I did _____ . I got a full mark.

Old people need special care in winter, as they are very______ to sudden change of the weather.

I should consider myself failing my duty if I didn’t take       action at that moment．

---Are you feeling _____?
---- Yes, I’m fine now ．

Football fans are always arguing over those ____ goals in the World Cup．