请解析此题Since it's snowing so hard,we ______ at home.A.had better staying B.should stayC.had better to stayD.might as well stay

请解析此题Since it's snowing so hard,we ______ at home.A.had better staying B.should stayC.had better to stayD.might as well stay There's a heavy _____(snow).It's ____(snow). 关于since It's almost three years____I last saw her.A.since B.when C.that D.after答案是选A,但不是说since 只能用于完成时的吗?此题做何解释呢? Look! It's _________(snow) heavily outside 改错 It's cold and snow today. It's going to snow in Harbin. it's years since i It's [ ][snow] in Moscow and it's very cold. It is snow in Moscow,It's snowing.大哥大姐 It often snow here.这句话对吗?it often snows here.为什么snow上要加s啊? It's a very heavy snow.(改为感叹句)___ ___ heavy snow it is! It's a long time since i saw you last.请问这里的缩略it's是指it 有此种缩略形式? it's +一段时间+since 是什么时态 it's been 39 days since you It’s cold and snow in winter in New Zealand.用snow 还是snowy Does it often (snow)in Beijing?snow 为什么不加s,不是宾语从句吗 it's often __(snow)in winter here It's snowing .The ground is c( ) with snow