If _______, these injuries can develop into more serious problems.
#81448
A
left untreating
B
left untreated
C
leaving untreated
D
are left untreated
推荐题目
No sooner _____ to sleep than the telephone rang once more. 
#80947
A
she went
B
she had gone
C
did she go
D
had she gone
      ,I would go.
#84333
A
I had the time
B
The time I had
C
Had I the time
D
Did I have the time
Not until all the fish died in the river _____ how serious the pollution was.
#82352
A
did the villagers realize
B
the villagers realized
C
the villagers did realize
D
didn't the villagers realize