用所给词的适当形式填空
1.There are three big___________(box)here.
2. My brother ________（have）a baseball bat.
3.This is___________(we)room.It’s very beautiful.
4.My sister _____________ (not have) a soccer ball.
5.There aren’t___________(some)pens in the pencil box.
6.I have two ________(knife) in my hand.
7.There are five (orange) trees in the park.