介绍自己的变化与进步 — 英语选择题
题目
Yang Ling 想介绍自己两年来的进步。下面哪一句最适合表达「我会写字了，两年前我还不会」？
A. I can write now, but I couldn't write two years ago.
B. I could write two years ago, but I can't write now.
C. I am writing a letter to my friend now.
D. I will learn to write next year.