About ______ of the land ______ covered with trees and grass.( )
three fifths; is
three fifths; are
three fifth; are
Old Mr. Green doesn't feel_____because some students visit him regularly.( )
sadly
gently
lonely
angrily
Mr. Black walked around and offered help____we were doing an experiment.( )
while
although
until
unless.
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