Jack became seriously ill after ________ in polluted air for many years.
#89778
A
breathed 
B
breath 
C
breathing 
D
to breathe
推荐题目
_______ in a friendly way, their quarrel came to an end.
#94239
A
Being settled
B
Settled
C
Settling
D
Having settled
In fact, the chances of anybody ______ by a whale are rather low. 
#97611
A
being swallowed
B
swallowed
C
to be swallowed
D
having swallowed
 ____ by high mountains, the city is infamous for air pollution. 
#90478
A
Surrounding
B
To be surrounded
C
Surrounded
D
Having surrounded