I cleaned my room yesterday. It _______ a little difficult.( )
A.isB.wasC.will be
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
She my sister, Meimei.( )
are
is
am