单项选择题
A. I’m leaving B. Thank you C. I’ll do my best D. and sit here E. Please sit down F. But I worry about G. Take it easy H. Don’t forget
A. an understanding of consumer needs B. the efficient movement of goods C. developing new wants for consumer goods D. making goods readily available to customers
A. they haven’t practiced enough B. the equipment is in need of repairs C. they perform risky acts without nets D. some are HIV positive