There has been rising demand for grain as industrial material in spite of the nation’s goo

发布时间：2020-08-16 07:43:56

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, /

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A. /, an
(答案→)B. a, an
C. the, an
D. a, /
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