73. The “alarm” in the first paragraph refers to “_______”. (A)a signal of stress (B)a warning of danger (C)a sign of age (D)a spread of disease

77. In the first paragraph, the underlined sentence “It shouldn’t.” suggest that people _______. (A)shouldn’t feel pleased with finishing the water in the bottle (B)shouldn’t feel good about drinking an expensive brand H2O (C)shouldn’t be content with just recycling empty bottles (D)shouldn’t be satisfied with drinking only bottled water