Feifei-35-->babypace转移

35. Because of increases in the price of oil and because of government policies promoting energy conservation, the use of oil to heat homes fell by 40 percent from 1970 to the present, and many homeowners switched to natural gas for heating. Because switching to natural gas involved investing in equipment, a significant switch back to oil in the near future is unlikely.

The prediction that ends the passage would be most seriously called into question if it were true that in the last few years.

A.        the price of natural gas to heat homes has remained constant, while the cost of equipment to heat homes with natural gas has fallen sharply.

B.        the price of home heating oil has remained constant, while the cost of equipment to heat home with natural gas has risen sharply.

C.        the cost of equipment to heat homes with natural gas has fallen sharply, while the price of home heating oil has fallen to 1970 levels.

D.       the cost of equipment to heat homes with oil has fallen sharply, while the price of heating with oil has fallen below the price of heating with natural gas

E.    the use of oil to heat homes has continued to decline, while the price of heating oil has fallen to 1970 levels

答案: D

我觉得C 对. 不改用OIL 的原因是对天然气设备的投资太大了. 不用可惜了. C 说明设备的费用大大减少, 且油价也降低了. 请指教!

After careful consideration, I think D is the only correct answer. When I chose C, I falsely assumed that the "the cost of equipment to heat homes with oil has fallen sharply" happend before people switched to nature gas, in which case the only obstacle for people to switched back to ill has been elimanited, therefore C should be the correct answer. But as the sentence reads that it is more likely that people had already bought the equipment when the price of it dropped, thus D should be the correct answer.