选择适当的介词填空。
on   in   under   behind   between    in front of
（1）The little bear is  _________ the tiger and the panda.
（2） What’s            the tree?  There is a bird.
（3）There are some umbrellas             the door，You can’t see them.
（4） Is there a dog            the table? Yes, there is.
（5）What’s_______ the plate? There is a fork.
（6）Bobby and Tina are running. Bobby is _________________ Tina.