1.Healthy diet should ________ some nutrition (营养素), ________ sugar, protein and calcium.
A. contain; included B. containing; including
C. be contained; included D. contain; including
2. He is the only one of the students who _______ a winner of scholarship(奖学金) for three years.
A. is B. are C. has been D. have been
3, My boss hates interruptions, when he is trying to work.
A．occasionally B．generally C．specially D．especially
