---I can’t find my pen. ---___ you put it in your book.
【2013雅安】We planted trees last year.
【2013黄石】It’s said that ______ of the water around the world ______ polluted.
【2013贺州】This tall building has _________ floors. And Tony lives on the ________ floor.
【2014黔西南州】—Which is the biggest number of the four? —_______.
【2014天津】______ month of the year is May.