A．can use only in emergencies B．may not understand at present C．never realize we have D．do not actively use in everyday living
单项选择题58（）
A. Hold the line B. flight number C. ask a question D. To New York E. May I have you name F. reconfirm my seat G. please check in H. On May 11th
单项选择题The underlined part this tiny human in Paragraph 2 refers to（）
A．a chimp B．Flores Human C．Homo sapiens D．Homo erectus
