outside the skies were grey为什么是用skies而不用sk?
outside the skies were grey为什么是用skies而不用sky
sky的复数,表示很多云
答:Would you please ____ the window ,it's too cold now . A to close B close C close...详情>>
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答:高等教育自学考试的英文名是higher education self-study examination详情>>