In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling.
#30873
A
as
B
when
C
while
D
once
推荐题目
I think _______ impresses me about his painting is the colours he uses.
#30000
A
what
B
that
C
which
D
who
.Everyone in the village is very friendly. It doesn’t matter ___ you have lived there for a short or a long time.
#30643
A
why
B
how
C
whether
D
When
--- Did you enjoy the party last weekend at Peter’s home? --- Oh, sure. It has been years _______ I last enjoyed myself like that.
#33492
A
since
B
before
C
until
D
when
“___________ the election is over,” said Powell, “the time has come for me to step down as secretary of state and return to private life.”
#33731
A
Now that
B
In case
C
So long as
D
As far as