. --Can you smell something _________  in the house? --Oh! I forgot to turn off the gas cooker! 
#88854
A
to burn
B
burning
C
having burnt
D
having been burnt
推荐题目
 The reason why Malaysia Airline Flight370 disappeared remained_____.
#88645
A
look into
B
to be looked into
C
looking into
D
to look into
I was almost _______ to death at the sight of the ________ scene.
#92740
A
frightening, frightened
B
frightening, frightening
C
frightened, frightened
D
frightened, frightening
The old man, ________ abroad for twenty years, is on the way back to his motherland.
#93411
A
to work
B
working
C
to have worked
D
having worked