A total of 548 students fell ill ______ consuming milk and biscuits in schools in Northwest China's Qinghai province on Wednesday, local authorities said.
#31253
A
before
B
when
C
after
D
while
推荐题目
I have been keeping the portrait ________．I can see it every day, as it always reminds me of my childhood in Paris.
#33733
A
since
B
where
C
as
D
if
________ on a clear day, the beautiful scenery gives him a sense of peace.
#31219
A
Walking
B
If walking
C
While walking
D
When one is walking
I’ve heard a whisper ______ David and Alice are going to get married.
#32753
A
what
B
which
C
who
D
that