Professor Smith, along with his assistants, _____on the Project day and night to meet the deadline.
A．work B. working
C. is working D. are working
He met his previous teacher ________ at abroad.
A.by any chance B. by the chance
C.by chance D. by a chance
Tom, ______ yourself .Did you forget the school rules?
A.behave B. believe
C. perform D. conduct
He is the only one of the students who ______a winner of a scholarship for three years.
A. is B. are
C. have been D. has been
Though having lived abroad for years, many Chinese still ______ the traditional customs.
A. perform B. possess
C. observe D.support
The president spoke at the meeting for nearly an hour without _______ his notes.
A.bringing up B. referring to
C. looking for D. trying on
