Mr.Zhao is going to the airport taxi.( )
in
on
by
Please ______ all the lights when you leave the classroom.( )
turn on
turn off
turn down
turn up
The boy in red T﹣shirt is our new classmates,______?( )
isn't he
does he
is he
doesn't he
The new school ______ last year.( )
builds
built
was built
is built
My parents often tell me ______ hard.( )
study
to study
studying
studied
What's your brother doing now?He _____ in the room.( )
sings
sung
has sung
is singing