将画有一条数轴的一张纸对折后，如果该数轴上表示3的点与表示-1的点恰好重合，那么此时与表示-3的点重合的点在数轴上所表示的数是 (          )

A.1            B.3             C.5           D. 7

If a sheet of paper with a number line drawn on it is folded in half, and the point representing 3 on the number line coincides exactly with the point representing −1, then the number represented by the point coinciding with the point representing −3 on the number line is (          )

A.1            B.3             C.5           D. 7