情景选择。 1.这是我的爷爷,应该怎么说?( ) A. This is my grandpa. B. That is my grandpa. 2.对别人说对不起时,该怎么说?( ) A. Sorry. B. Sit down. 3.这是你的妈妈吗?该怎么说?( ) A. Is this your mom? B. This is your mom? 4.我是一个学生,该怎么说?( ) A. I am an pupil. B. I am a pupil. 5. 他是一名警察,该怎么说?( ) A. His is a policeman. B. He is a policeman. 6.她是一名护士,该怎么说? ( ) A. She is an nurse. B. She is a nurse.