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
Patience is a kind of quality—and that is ____ what it takes to do anything well.
#29992
A
what
B
which
C
that
D
How
I doubt ____________all the people invited will come to attend the ceremony in such bad weather.
#31696
A
whether
B
that
C
how
D
what
(2013·天津，6)We have launched another man－made satellite，________is announced in today's newspaper.
#30503
A
that
B
which
C
who
D
what
---Bear in mind that you won't be able to cancel the contract ____you've signed. --- I _____.
#80350
A
unless; do
B
since; will
C
once; will
D
after; have