Food shortage will long be a worldwide problem much has been done to supply enough for ev

发布时间：2020-08-17 13:29:26

Food shortage will long be a worldwide problem      much has been done to supply enough for everyone.
A. before
B. if
C. since
D. although

网友回答

A. before
B. if
C. since
(答案→)D. although
解析：本题考查状语从句；虽然为满足每一个人的需求做了大量的工作，但食物缺乏仍然是一个长期的问题，所以选although。
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