, 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
Professor Smith told me that the book was well worth ________.
#94426
A
reading
B
to be read
C
to read
D
being read
They often stay up, reviewing their lessons, books      all over the desk.
#92407
A
spreading
B
spread
C
are spreading
D
to spread
---Where are you, Tom? ---Here in the sitting room, ___to Professor Smith.
#97175
A
to write
B
writing
C
is writing
D
to be writing