Drugs are harmful to people's physical and mental health. We teenagers must_____them.( )
take care of
keep away from
get used to
Michael_________in a school in Yunnan from February to June next year.( )
teach
taught
will teach
was teaching
Must I do the project on my own?
No, you____.You can work with your classmates.( )
needn't
can't
shouldn't
mustn't
Frank is an independent boy. His parents are proud ____ him.( )
on
to
in
of
The bridge between the two islands is _______ one in Shanghai.( )
long
longer
longest
the longest
Catherine has two cousins. One is quiet, and______is noisy.( )
another
the other
other
others