_____ that air conditioners cause so much pollution, I would never have bought one.
#83033
A
Had I known
B
I had known
C
Were I to know
D
Did I know
推荐题目
Perhaps not in my memory. , it might have been during my early childhood.
#81306
A
If ever
B
If any
C
If once
D
If so
_________, the weather in America is different from place to place.
#84398
A
As China
B
Like in China
C
Like China
D
As in China
Lily is so kind-hearted a girl that she often gives __________ needs her help.
#80760
A
who
B
whom
C
whoever
D
whomever
The little child usually felt frightened at night, so not until ___________.
#82789
A
did he fall asleep his mother left the room
B
he fell asleep had his mother left the room
C
did he fall asleep did his mother leave the room
D
he fell asleep did his mother leave the room
_______a rapid stream between the two hills.
#83750
A
There flowing
B
Flowed there
C
Flowing there
D
There flowed