单项选择题
A．She doesn’t remember much about the city. B．She’s never been to the city. C．She would find someone else to help. D．She would talk to the man later.
A．Only humans respond to emotions by shedding tears. B．Only humans shed tears to get rid of irritating stuff in their eyes. C．Only human tears can resist the invading bacteria. D．Only human tears can discharge certain chemicals.