问题
选择题
--Writing is a skill, it looks easy but it be difficult.
--No wonder I'm not so good at writing. I need to practice a lot.
A. must
B. can
C. should
答案
答案：B
本题考查情态动词的用法。can会，能；must必须；should应该根据句意“写作看起来容易，但是它会很难。”故选B。