The harder you study,the _______ grades you will get.( )
well
better
good
best
Miss Green will teach _________ English next term.( )
they
them
themselves
their
She has _________ books than you.( )
many
much
more
most
This math problem isn't so difficult that I can work it out ________.( )
easily
usefully
loudly
quietly
John is _______ American student.( )
a
an
the
/
Please ____ the dog for me while I'm away.( )
look
look after
look up
look out