Mary____ a math problem with her classmates when the math teacher knocked at the classroom door.( )
has discussed
was discussed
was discussing
discusses
Daming in this place since two years ago.( )
have lived
has lived
lives
Tony table tennis ever day.( )
doesn't play
doesn't plays
don't play
Look!they basketball on the playground. ( )
play
plays
are playing
My sister is than me.( )
thin
thinner
thinnest
This is friend. His name is Tom.( )
my
me
I