问题补充：
- Excuse me, would you please speak a little more?
-Sorry, I thought you could follow me.
A. sadly
B. quickly
C. slowly
D. Politely
答案：
A. sadly
B. quickly
(答案→)C. slowly
D. Politely
解析：句意：对不起，请你说慢一点好吗？抱歉，我还以为你能听懂我的话呢。根据后面的I thought you could follow me可知，对方应该是因为“我”说的过快而跟不上；A伤心地B快速地D礼貌地；故选C。
