___________for his good skill, this doctor has a lot of visitors calling for help all the time.
#48486
A
Knowing
B
To know
C
Known
D
To have known
推荐题目
Sir, would you mind not _____ here, please?
#49378
A
to smoke
B
smoke
C
smoking
D
smoked
Mr Wang does what he can ________ us improve our English. 
#51198
A
help
B
to help
C
helping
D
helped
 ________is wrong  with  my watch .  It’s has stopped _________.
#48615
A
Something ; working
B
Something ; to work
C
Anything ; working
D
Anything ; to work
-- The math problem _________ is not difficult. --- But after several tries , I have to give up _________ on it .
#49383
A
it’s , working
B
itself , to work
C
itself , working
D
its , to work