问题描述：
In this world,some people wasted food others.haven't enough.
A、 since B、because C、 when D、while
我知道为什么选D ,但选C哪里错了?C、D都对吧!
In this world,some people wasted food-----others haven't enough.
A、 since B、because C、 when D、while
我知道为什么选D ,但选C哪里错了?C、D都对吧!
In this world,some people wasted food-----others haven't enough.
问题解答：
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