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 find someone______understands my dislike for the conventional driveway makes me eternally grateful．
#32380
A
What; that
B
When; who
C
Who; that
D
That; who
To keep healthy, you should eat any of the food that is offered on the table _______ it is not well cooked.
#31170
A
if
B
until
C
that
D
unless
Martin and his friends didn’t eat up all the food they ordered, _____ they took the rest away.
#31270
A
so
B
or
C
for
D
as
No hurry at all. The train will come in an hour；________, we can have lunch.
#33088
A
though
B
meanwhile
C
however
D
while