___ books (an / the)
an
the
___ starfish (a / an)
a
___ alligators (an / the)
___ spider (a / an)
___ beaver (a / an)
___ castle (a / an)
___ ball (a / an)
___ octopus (a / an)
___ elf (a / an)
___ moon (an / the)
___ shoes (a / the)
___ scarf (a / an)