She often practices _____ on weekends.( )
sing
sings
singing
to sing
﹣What is this?
﹣It's pencil.( )
the
an
a
Help yourself to some_________,Jim.( )
potato
fish
egg
Li Ying cleans her room the weekend.( )
at
for
in
﹣ you swim?
﹣Yes, I can.( )
Must
May
Can
Sally knocked on the door but answered.( )
somebody
nobody
everybody