You can’t imagine what great trouble they have _________ the problem_______.
#95579
A
to solve; being talked about
B
solving; discussing
C
to solve; to talk about
D
solving; being discussed
推荐题目
It seemed that the sea lion didn’t mind _______ with the tourists at all.
#91832
A
photograph
B
photographing
C
to photograph
D
being photographed
 _____ to sunlight for too much time will do harm to one’s skin.
#98000
A
Exposed  
B
having exposed
C
Being exposed
D
After being exposed
(2011·湖南高考)The ability ________ an idea is as important as the idea itself.
#89005
A
expressing
B
expressed
C
to express
D
to be expressed