单项选择题
A. What should I do B. Thank you, mom. C. Where have you been D. Yes, he is. E. What was wrong with him F. Were you sick G. Where is the hospital H. I’m sorry to hear that.
A．the efficient production of goods B．a perfect command of salesmanship C．a basic command of the marketing concept D．the conversion of goods into money
A．to avoid being eaten by arctic animals B．because fertilizer is not readily available C．to minimize exposure to the cold D．because unfrozen water supplies are very scarce