Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
Coal, oil, and natural gas supply modern civilization (1)............. most of its power. However, not only are supplies of these fuels limited, but they are a major source of pollution. If the energy demands of the future are to be met without seriously harming the environment, existing (2)........energy sources must be improved or further explored and developed. These include nuclear, water, solar, wind, and geothermal power, as well as energy from new, (3)........... types of fuels. Each of these alternatives, however, has advantages and disadvantages.
Nuclear power plants efficiently produce large amounts of electricity without polluting the atmosphere; however, they are costly to build and maintain, and they pose the daunting problem of what to do with nuclear wastes. Hydroelectric power is (4)........ and environmentally safe, but impractical for communities located far from moving water. Harnessing energy from tides and waves has similar drawbacks. Solar power holds great promise for the future but methods of collecting and concentrating sunlight are as yet (5).........., as are methods of harnessing wind power.
Hydroelectric power is (4) _____and environmentally safe, but impractical for communities located far from moving water.
Trả lời bởi giáo viên
expensively (adv): đắt
inexpensively (adv): theo cách không đắt
inexpensive (adj): không đắt
expensive (adj): đắt
Sau tobe cần điền tính từ, dựa vào nghĩa , ta chọn đáp ám C
Hydroelectric power is (4) inexpensive and environmentally safe, but impractical for communities located far from moving water.
Tạm dịch: Năng lượng thủy điện không đắt và an toàn cho môi trường nhưng lại không khả thi với những cộng đồng dân cư sống xa nguồn nước chảy.