, he dialed 999. 
#89716
A
Seen the house on fire
B
To see the house on fire
C
Being seen the house on fire
D
Seeing the house on fire
推荐题目
_____ in time for Christmas,all these gifts must be mailed immediately 
#92599
A
So as to be received
B
In order to receive
C
So as to be receiving
D
In order to be received
The play           next month aims mainly to reflect the local culture.
#88550
A
produced
B
being produced
C
to be produced
D
having been produced