A. May I open the door? B. May I open the suitcase? C. May I open the trunk? D. May I open the window?
A. Never mind. B. Ecuseme. C. Sorry. D. No prob1em.
A. Goodmorning. B. Goodafternoon. C. Goodevening. D. Goodnight.
A. 社会公德的要求 B. 职业道德的要求 C. 人际交往的要求 D. 共同合作的要求