The trouble with such resources as coal, oil and gas that they are not renewable.
A. was
B. are
C. have been
D. is
网友回答
A. was
B. are
C. have been
(答案→)D. is
解析：本句的主语是the trouble,后面的介词短语with such resources as coal, oil and gas作为定语，修饰该名词。句义：对诸如煤炭，石油，天然气等资源的困扰是这些资源都是无法再生地。因为主语是一个单数形式，所以谓语动词也使用单数形式。A项使用的是一般过去时，而本句中也没有一般过去时的时间状语。故D正确。