According to the passage which of the following statements is true？A．All kinds of the unc
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According to the passage, which of the following statements is true？
A．All kinds of the unconventional gas are being much developed in Australia.
B．Most of America"s natural gas now comes from the conventional sources.
C．The development of the unconventional gas results in higher gas prices.
D．Only in the US has the unconventional gas been developed to any extent.
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正确答案：D
本题为概括题。根据第二段“…buttherearenodevelopmentshereofshalegasortightsandsgas”可知A错误；根据第三段“abouthalfofAmerica’snaturalgasnowcomesfromthesesources，ratherthantheconventionalsources”可知B错误；根据第四段“Theswitchtowardsunconventionalgasistheresultofhighergasprices…”可知C因果相反；根据第四段“OnlyintheUnitedStates…hasunconventionalgasbeendevelopedtoanyextent”可知D正确。