能否帮忙订正以下6句话:并用虚拟语句1.It′sorderedthatwemusthaveclassesduringthe
holiday.2.Itisnecessarythatstudentsshouldlearnmorescientificculture.学生期间,多学习科学文化是必要的3.It′shightimethatIkeptwordsinmind.4.Iwouldratherhedidn′ttellmethisthing.5.Ifonlyitshouldraintomorrow.6.Iftherewasnosunshine,otherwise,allorganismsontheearthwoulddie.(如果没有阳光,地球上所有生物都会死)