Of all the drinks,tea is ________ in the world.It has a history of about 5,000 years.( )
A.oldB.olderC.the oldestD.very old
Be careful with the knife.You may hurt______.( )
himself
ourselves
myself
yourself
Their classroom is as______ as ours.( )
cleaner
clean
the cleanest
much cleaner
Beijing is one of ______ biggest cities in China.( )
a
an
the
/
What kind of musicians do you like?
I like musicians ______ play different kinds of music.( )
which
whose
whom
who
Please ______ all the lights when you leave the classroom.( )
turn on
turn off
turn down
turn up