they're on the desk.

they're on the desk. 1.they're on the desk.2.they were there a moment ago .but wh They're on the Where are my knife?They're on the desk.错在哪里? There're three apples on the desk. They're on the table. are they?they're on the water are they on the desk just now Where are my shoes?They're under the desk. they’re on the tip of my The book on the desk belong to____(they) the books on the desk are not mine;they‘re______