Đọc Điền 19: Green Roofs – An Urban Solution? (Mái Nhà Xanh Đô Thị)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 86 to 90.

GREEN ROOFS – AN URBAN SOLUTIONS?
Are you fed up with living in a building that's baking hot in the summer and freezing cold in the winter? Have you had enough of expensive electricity (86) _____? Regardless of whether you live in a detached house or a tower building, environmentalists, ecologists and gardeners might have come up with the solution to (87) _____ your problems: a green roof.

Green roofs - roofs (88) _____ are covered with plants - are becoming increasingly popular. They're great in terms of turning an otherwise under-used space into a lovely garden, providing (89) ______ and creating an eco-system in an urban environment. (90) ______, recent studies have shown that if the majority of buildings in a typical city centre had green roofs, the average temperature on the hottest days could come down by several degrees.
(Adapted from Optimise by Malcolm Mann and Steve Taylore-Knowles)