It has been snowing ____several days.A .since B.for C.in D.before

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It has been snowing ____several days.A .since B.for C.in D.before

It has been snowing ____several days.A .since B.for C.in D.before
It has been snowing ____several days.A .since B.for C.in D.before

It has been snowing ____several days.A .since B.for C.in D.before
B 天已经持续下雪好几天啦!这是个现在完成进行时
用for 表明雪一直持续到现在