单项选择题
A.making use of developed land B.developing new land C.clearing the ground in a forest D.draining wild habitats
A.continue the discussion of total U.S. electricity use B.expand the topic of reduction of energy and water use C.include the discussion of public transportation D.shift the focus to the topic of the environment protection
A.Buildings painted by green hands. B.Buildings covered with green plants. C.Buildings that are environmentally-friendly. D.Buildings like houses, factories, and offices.