It worried her a bit _____________ her hair was turning grey. 
#95111
A
which
B
that
C
if
D
for
推荐题目
 The machine has been used many years_____ it doesn’t work well occasionally.
#94762
A
That’s because
B
It’s no wonder that
C
There’s no doubt if
D
It’s unlikely that
There is ________ in population that a food shortage is caused.
#93512
A
so rapid an increase
B
such rapid an increase
C
such rapid increase
D
so a rapid increase