_____ middle school students allowed to use mobile phone at school ?
Her grandfather________for two years.
—Millie,where is Miss Li? —She________a speech on Chinese art to the first-year students in the hall.
Not only________polluted but________crowded.
Boy,your books are everywhere.Please________. A.put them up B.put them on C.put them away
________get off the bus before it stops. A.Don’t B.Doesn’t C.Didn’t