Experts have been warning _____ of the health risks caused by passive smoking.
#28424
A
at a time
B
at one time
C
for some time
D
for the time
推荐题目
— _________, this math problem seemed quite simple to me, but when I tried to work it out, I just couldn’t.— There are always things like this, I think.
#27613
A
On one hand
B
In my opinion
C
At first sight
D
On its own
Looking up, I saw that some children _____ rags were looking at me silently as I ate.
#26519
A
with
B
by
C
on
D
in
They always lay a large supply of tinned food in winter in case they are snowed up.
#27644
A
out
B
off
C
in
D
with
Trains with the first letter D or Z can run __________ a speed of more than 200 kilometers an hour when it travels __________ the desert.
#25568
A
with; cross
B
in; through
C
at; across
D
for; in