单项选择题
Conversation 1
A．The screen has gone black. B．The keyboard doesn’t work. C．The connections are broken. D．The power supply is off.
A．Happy. B．Excited. C．Nervous. D．Angry.
A．They can’t agree on the price. B．The man’s order is too small. C．The man asks for earlier delivery. D．They disagree on the discount.