Paper is useful invention.Cai Lun invented it around 2,000 years ago.( )
a
an
the
不填
On my________ birthday,I got a new schoolbag as a gift from my parents.( )
nine
ninth
the ninth
What time do you usually get up?
_____7:00.( )
At
In
On
They didn't go home________ they finished their work.( )
because
when
until
Night Safari is an amazing__________and you can watch animals there at night.( )
school
zoo
hospital
Welcome you all to Guangyuan and enjoy ____here.( )
you
your
yourselves