Many provinces have been hit with smog. If _______ unsolved, the problem may lead to more serious results.
#80140
A
having left
B
to leave
C
left
D
leaving
推荐题目
Only when he reached the teahouse ________ it was the same place he'd been in last year.(2011·全国Ⅰ)
#79534
A
he realized
B
he did realize
C
realized he
D
did he realize
When_______help, one often says “Thank you.” or “It’s kind of you”.
#84389
A
offering
B
to offer
C
to be offered
D
offered
These problems, __________, will seriously affect the growth of teenagers and even the nation’s future.
#82644
A
solved properly
B
if solved properly
C
not if properly solved
D
if not solved properly
Not until he went through real hardship _____the love we have for our families is important.
#81018
A
had he realized
B
did he realize
C
he realized
D
he had realized
, the farmer continued working in the field.
#79918
A
As tired he was
B
As he was tired
C
Tired as he was
D
So tired was he