单项选择题
A．Hurry to the conference. B．Skip the conference. C．Take the subway. D．Take a bus.
A．They are less likely to run away. B．It’s easier for their masters to train them. C．They are less likely to be shy with human beings. D．It’s easier for them to form a relationship with their masters.
A．Their hardworking spirit. B．Their patience in waiting for theatre tickets. C．Their delight in leisure activities. D．Their enthusiasm for the arts.