---It’s a long time since I saw my sister.her this weekend?Why not visit B. Why not to

问题补充：

---It’s a long time since I saw my sister.

--- her this weekend?

Why not visit B. Why not to visit

C. Why not visiting D. Why don’t visit

答案：

解析：考查搭配。Why not + V原形……为什么不呢?句意：好久没见我姐姐了？——这个周末为什么不去看望她呢？