The trouble with such resources as coal, oil and gas that they are not renewable.A. was B

发布时间：2020-08-17 08:15:58

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：句意：象煤，油和气这样的资源问题是它们不是可再生的。这句话是客观事实，所以用一般现在时，又因为主语是the trouble所以谓语用单数，所以选D。
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