In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs,...
--__is that on the desk? --My Chinese book.
Who's the little girl __ a yellow hat?
Look __the map. It's a map __ China.
--What's this? --It's__ backpack. --Where's__ backpack? --It's on the bed.
--Where's Shanghai?--It's __China.