拓展练习：1.Here's the key( )the room.2.The boy is ill( )bed.3.You can spell it( )English.
4.My book is ( )home.5.They put up a picture( )the frout wall.6.Our school is( )the post office and the police station.7.There are some birds( )the tree.8.There is a window( )the wall.9.The girl( )a blue dress is my sister.