There has been ____rising demand for grain as ____industrial material in spite of the nation’s good harvests.
A./;an
B.a;an
C.the;an
D.a;/
网友回答
B解析：demand作为要求和请求时为可数名词；作为需要需求时为不可数名词，在惯用法中既可以说much demand,也可用 great/rising等形容词修饰。一些不可数名词前有形容词修饰时，前面用不定冠词。material与此类似。【标签】冠词用法