Lucy and Claire are sisters.________often help their mother do the housework.( )
We
You
They
She
I have been in China______ 1997.( )
since
for
in
until
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