Sam is 11 years old. Peter is 16 years old. Peter is 5 years _____ than Sam.( )
A.olderB.shorterC.newerD.longer
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
Who is ______,Tom or Dave?Dave.( )
tall
taller
tallest
the tallest
There are ______ cars in the street.It's so crowded.( )
hundred
hundreds
hundred of
hundreds of
Mr.Wang teaches _______ Chinese.( )
us
we
our
your