How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?
#31247
A
unless
B
when
C
until
D
before
推荐题目
You have failed two tests. You’d better start working harder, ____ you won’t pass the course.
#30694
A
and
B
so
C
but
D
or
I can’t find a proper dictionary _______ I can turn in my study.
#33890
A
to which
B
up which
C
on which
D
for which
One advantage of playing the guitar is it can give you a great deal of pleasure.
#33798
A
how
B
why
C
when
D
that