谁能出一道英语单选,然后有解释,顺便有相关知识点?谢!

I'll give you my telephone number ______you might want to get in
touch with me again.
A. unless
B. so that
C. in case
D. since

The answer to yesterday :A
分析：
as 引导让步状语从句，表语或副词要提前，形成倒装句式。