【原创】The students are forbidden, unless they get the permission from their teachers, ______ after 10 p.m.
—Are there any tickets left? —Sorry. There are ________, if ________.
—What should I wear for the party? —It’s an informal one; it doesn’t matter ____ you’re dressed.
Recognized as ________ world cultural heritage by the United Nations in 2002, paper cutting is ________ practice which originated in ancient China.
After the war, a new school building was put up ________ there had once been a theatre.
Customers should learn to ________ advertisements so as not to be misled by them.