The Qingming Festival has become a national statutory holiday with （） off since 2007.
A.a day
B.two days
C.three days
D.three days
正确答案：a day
The Qingming Festival has become a national statutory holiday with （） off since 2007.
A.a day
B.two days
C.three days
D.three days
正确答案：a day