单项选择题
A．fed B．domesticated C．trained D．confined
A．Children with truthful cry may eventually draw their mothers’ attention. B．Noisy infants are preferred by their mothers for their health and strength. C．Mothers would rather nurse the obedient babies.’ D．Mothers tend to ignore the deceitful cry.
A．Customers’ demand and competition with retailers. B．The aging baby-boomer and diversity of food. C．Competition with retailers and diversity of food. D．Customers’ demand and the aging of baby-boomer.